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I'm 21 and have been taking the same birth control regularly for the past 4 years or so. I recently had to start a 4 week cycle of antibiotics (both amoxicillin and metronidazole) to fight an intestinal infection. So far I have finished 3 weeks of the antibiotics and have only one more to go. I have heard that antibiotics can cancel birthcontrol, so we have been using alternate forms of contraception since I started the antibiotics to be extra safe. However, I accidentally missed the first 3 pills of my pill pack due to a combination of me not realizing I was on my last pack and not having any refills left before I went on a trip. I got my pill pack as soon as I returned and have been taking them again regularly. Unfortunately my boyfriend and I had sex ONCE without any kind of backup contraception since missing those first 3 pills of my pack (not to mention the fact that I'm on those antibiotics) and now I am starting to freak out. I know there is always the possibility of birth control failing, especially if you miss multiple pills or are taking antibiotics, but I guess I am wondering how freaked out I really need to be. What are the chances that we got pregnant since I missed several pills and am also on a strong antibiotic regimen? Any thoughts or help would be greatly appreciated
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Hi,
September 8, 2011 - 4:28pmTry to relax. Getting yourself worked up emotionally is counterproductive. Even if you didn't conceive, stressing out can cause your period to be late. It is difficult to know if the one time you and your boyfriend had unprotected sex was when you were ovulating. Then, there would be a good chance that you conceived. Additionally, amoxicillin can make birth control pills less effective. All you can do now is wait for your period. If you are late by a week or more, you can take a home pregnancy test. If you want to get an answer sooner, make an appointment with your gynecologist to have a blood pregnancy test done.
Maryann
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