On yaz. had sex six days ago and now have to take penicillin cause im sick. no sex since then can i still get pregnant if it was six days ago?

B.C. stays effective: The current thinking is that except for rifampin, other commonly-used antibiotics do not alter the effectiveness of birth control pills. This is likely presuming a person is not sick with vomiting or really bad diarrhea, or some other condition that decreases the absorption of a swallowed pill. One can look up: http://www.ncbi.nlm.nih.gov/pubmed/12063491