So the other day I had unprotected sex. I took plan b the morning after because I had to double up on a pill one day. I’m on birth control but I realized after the fact that I’m on an antibiotic (augmentin). I googled it an it is known to make birth control less effective. My partner did not cum inside me so should I be ok? Or do I need to worry about precum. My period was supposed to start yesterday but I know plan b can throw it off a little. I’m just really worried about the antibiotic. I just don’t know what I should do.