me and my girflriend had sex the other day while she was on her pill. however we werent aware until after that the antibiotic she was currently taking could potentially have killed the effects of birth control. she looked up which birth controls are effected and couldnt find anything about hers (i dont kno the name of it tho) and although i didnt cum inside her(ended up just going and getting condoms anywyas) we did do it unprotected for a while and i kno about how precum could be harmful to the situtation.
so with all that said chances are more the likely slim-to-none taking everything in to consideration, right?