I have been on the birth control pill ortho tri cyclen for a couple months now but i got strep throat and was on an antibiotic for ten days.. aparantly antibiotics make birth control uneffective while you are taking the antbiotic and for two weeks after.. however i had unprotected sex with my boyfriend a couple days after I stopped the antibiotic.. although he pulled out I'm still nervous about re-cum.. ALSO an hour or two later he stuck the tip of his penis back in me but I got nervous so he stopped because I though that if there is sperm still on him penis then I could get pregnant.. maybe I'm overreacting but please reply.. I'm on the third day or my sugar pill now and I haven't gotten my period yet..