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Having sex 2 days before antibiotics on birth control

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I have been on birth control for almost 3 years and on Wednesday morning I had sex and he ejaculated inside me but I did not use any backup method except for my birth control pills. Friday morning (tomorrow) I have wisdom teeth surgery and will be taking antibiotics. Will having sex 2 days before taking antibiotics increase my likelihood of becoming pregnant? Should I wait a few days before taking antibiotics? I know that the effectiveness of birth control is decreased while you are taking antibiotics and one week after you have finished taking them, but I have not heard anything about having sex before taking antibiotics.
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replied April 27th, 2017
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There are only a few types of antibiotics that affects birth control efficacy. It is very unlikely that a dentist will give you any of those.
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replied April 27th, 2017
Thanks for the reply. However it does have a warning in the post-operation instructions that the antibiotics may interact with birth control, but it does not say anything about using back-up contraception in the few days prior to taking antibiotics. I understand that it is still unlikely but I'm really freaking out.
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