So heres the deal...my girlfriend and I are in college. She has been on the pill for a long time but she ran out of them. She was off the pill for about a month and she came to visit me and we fooled around and ended up having sex. We were both drunk so we were not thinking very clearly and we started out without a condom until I started feeling like I could come soon. We finished and it was fine. Recently we started worrying that maybe she could be pregnant because of the pre-cum. Does anyone have any counsel, advice, or facts they can give me. I know that pre-cum does contain sperm but I want to know hard facts about the chances. She got on the pill 3 days before we had sex that night if that means anything aswell. I know that it takes a week or a month or something to start working, but I just need some reassurance for myself and my girlfriend. thanks alot