How to Tell if You’re Pregnant When You’re Taking Birth Control

on Nov 04, 2012

by Dr. Prabha Sahgal, MD

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How to Tell if You’re Pregnant When You’re Taking Birth Control

Although birth control pills prevent you from getting pregnant, they are not 100% effective. With the slight possibility of pregnancy, find out how to tell if you're pregnant when you're taking birth control.

Although birth control pills have the role to prevent you from getting pregnant, none of these treatments are 100% effective. As a result, you can conceive even when you take your pills on a daily basis, without realizing it, so, the following information on how to tell if you’re pregnant when you’re taking birth control should come in very handy. Here is a list with the 6 most common and easy to notice symptoms. Claim Your 20 Free Pregnancy Tests – Click Here


If you feel exhausted during the day, even having enough sleep, it may be a sign that you are pregnant. As soon as the egg is fertilized and it is implanted in the uterus, the body begins to produce increased amounts of progesterone, a hormone that plays an important role during pregnancy. The process can make you feel tired and sleepy.


Nausea, manifested especially in the morning, is another sign of pregnancy, not necessarily related to the birth control pills you were taking, that appears after two weeks from the fertilization of the egg, or in the second half of the first pregnancy trimester.


Light cramps in the lower part of the abdomen is another symptom common to most lists on how to tell if you’re pregnant when you’re taking birth control pills. This symptom, also known as uterine cramps, appears when the egg is implanted in the uterus, and it is experienced in the first couple of weeks following conception.

Weight fluctuations

Unusual weight fluctuations can also indicate a pregnancy, being the result of the secretion of certain hormones in quantities greater than normal. While some women start to put on weight as soon as they conceive, others may lose some pounds in their first weeks of pregnancy.

Light bleeding

A light bleeding, called implantation bleeding, that occurs after the period may also be a sign that you conceived while taking birth control pills. This symptom is the result of the egg being attached to the lining of the uterus, and it usually happens in the first or second week after the egg is fertilized.

Rise in basal temperature

A higher than normal basal temperature is usually considered a symptom of the forthcoming ovulation. However, if the temperature remains elevated for days and even weeks after the egg is released, it is a great possibility for the fertilization to take place even under the influence of the birth control pills.

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How to Tell if You’re Pregnant When You’re Taking Birth Control, 4.1 out of 5 based on 10 ratings

Dr. Prabha Sahgal MD, is board certified in obstetrics and gynecology and subspecialty board certified in reproductive endocrinology and infertility. Dr. Sahgal holds a B.S. degree from MIT in molecular biology and currently serves on the ConceiveEasy board of directors.

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  2. Infertility and Birth Control Pills
  3. Getting Pregnant After Birth
  4. Stages of Labor and Birth
  5. Period or Early Pregnancy Bleeding?
  • Sheyanne

    Video is for attention I need someones help my baby boy is almost 4 months old my period has never been irregular it came late the very first time I had it again after my son was born yes I’m sexually active but I’m on birth control and use protection but my period is 4 days late and im freaking out i’ve taken two test the past two days and they are negative whats going on??

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  • Torrie

    I have been switched to trinessa almost 6 months ago, I am on a 3 month dose at a time. I never miss a day. I had unprotected sex with my bf, he didn’t cum inside but I took a pg test just to be sure it was negative after the 2-3 min. But the next day I looked at it and it had a very faint line in the second window, I had taken the morning after pill as well. Should I take another test? What does that mean?

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  • Emily Jackson

    So I’ve been taking birth control regularly around the same time every night. My boyfriend and I had sex with a condom, and then a couple hours later with out a condom but he pulled out.. My period is supposed to start today.. Could I be pregnant or am I just over thinking it??

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  • AM

    Im currently taking birth control, my boyfriend and I had unprotected sex over a week and a half ago and yesterday I experienced really bad cramps (I’ve dealt with colitis and the pain was incredibly similar) and later that night I had very light but coagulated bleeding. I started my new pack of bc a day or two after we had sex. Is there a chance i am or got pregnant? Or if the coagulated blood was a miscarriage?

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  • Shayla

    Hi, i’m on birth control. tri-previfem to be exact. I missed 2 pills, and was a little behind. Me and my boyfriend never uses condoms, nor the pull out method. However, when I was behind on the pills he never “came” inside of me. Except for when I finally caught up, he “came” inside of me. Then i was on the placebo pills(The Green One, that you’re supposed to take while on your period) However, my period came late, on a Friday and only lasted to the Sunday. And now, two weeks later, I’m cramping and spotting. And not to mention before the missed pills, my breasts have been feeling tender, and heavy non stop. (up to this date they still do.) I have food aversions where as I will throw up if i eat certain foods. I’ve been really fatigue, and cramping and weird feelings in my abdomen where it’s a little hard to suck in my stomach. And not to mention having sex now, really hurts… Can I be pregnant? Should I take a pregnancy test? please help.

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  • faith

    I’m 24 yrs old and didn’t have intercourse until last October for the first time with my fiancé. Shortly after I started taking BC. However, about 2 months ago, I got my period 2 weeks early, bleed real bright red for the first day and only had little spotting for the next two weeks but on my actual time of the month that my period starts, I was late, then bleed real heavy for about an hr and then spotting for a week after that. and It happened again, this month but lighter than before. I work overnights, days and midshifts so I do tend to forget once or twice to take my pill but always take them when I remember. I’ve taken two home tests and both negative but my breasts are swollen, my lower abdomen feels full all the time, even when I haven’t eaten. and I have discomfort on both sides of my pelvis, especially the right. Is there a strong possibility that I could be pregnant?

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  • Hayleigh Gilman

    I’m a little late in this discussion, but 2 weeks ago I had sex with this guy. I am on depo. and for a whole week so far I’ve been bleeding heavier then normal. usually I just spot for three days. what could this be?

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  • Happy_Possibilities

    Okay ladies.. I’ve been on birth control since I was 16, I’m 23 now & happily married for almost 3 years (yay!). On my last pill pack in July, I somehow doubled up without knowing I did, accidentally taking two pills in one day. I continued my pack as normal. When my inactive pills came around, I started my period a day early of course, because I was technically a day ahead, but decided to get my pill packs back on my *Sunday starter* normal schedule. In order to do this, I technically started my pill pack a day late, considering I was a day ahead already. So what happened was, instead of starting my new pack on Saturday, I skipped & started my new pack on Sunday to get back on schedule. I did not double up, & I did not use extra contraception. My love life is a little all over the place.. But I’m pretty sure my hubby & I made love at least twice within the week that I skipped.

    Fast forward to now, it’s Tuesday. A complete week & 2 days since I started my new pill pack, & I am feeling SICK. I’ve been having awful nausea, light headaches randomly.. Only two so far thank god, my husband & I fought yesterday so so badly.. I threw a plate ladies. A plate. I never broke anything in a fight before. I’ve also been feeling tight in my stomach, been having weird tingles or pains.. Hard to explain really.. I’m also so fatigued lately, I even find it hard to get out of bed in the morning after having my 8 hours.. Something weird is happening to my body, & I might just be sick & crazy, OR maybe I have a possibility of pregnancy? Does anyone have a similar experience or think I may have ovulated & conceived? It wouldn’t be a bad thing honestly. Blessing in disguise.. ????

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  • Estefani

    Hello, im on birth control pills but recently this past few days while getting closer to my period i have been feeling nauseous and dizzy could it be because of my birth control? Or can i get pregnant even though im taking chryselle birth control pills? Thanks

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  • Erza

    I Had Sex With My Boyfriend While On Birth Control And I’m Having 5/6 Of The Symptoms. I’m Really Scared I Might Be Pregnant… What Do I Do? I Don’t Want My Mom To Know.

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  • Ace

    I’m on the pill and I haven’t taken it in a month I keep forgetting and I have had unprotected sex with my boyfriend could I be pregnant my period was a week early and only last two days when usually last longer

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  • debzy

    i am on the pill however i miss a day and had unprotected sex on that day.can i be pregnant

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  • Laura

    My period ended earlier than my placebo pills ended, so I had unprotected sex those days and then I forgot to take my oral birth control for 4 days after that, that was 7 days ago and now I’m bleeding (like a light period), am I pregnant?

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