I am on birth control pills never missed a pill , I got my period 28 February 2011 used antibitics on the 26 & 27 February 2011. On the 28 February I started my new pack active pills . On the 4 March I had unprotected sex . Am I pregnant ? I never missed any pills .
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Having antibiotics along with birth control pills can affect the efficacy of the birth control pills. You should have considered having emergency contraception after unprotected intercourse. If you are having symptoms suggestive of pregnancy or suspect to be pregnant, you can consider visiting your doctor/gynecologist to get examination and blood HCG test done to confirm/rule out pregnancy. If pregnancy gets confirmed, you should stop taking birth control pills immediately.
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