I met a girl at a party last weekend. We both got really drunk, one thing led to another and we ended up going to her room and having sex. I wasn't planning on it, so I didn't have any condoms. But we were both really drunk and we just went through with it anyways. I came inside her, and she seemed kind of surprised at first but told me it was ok. Later I asked her if she was on any birth control and she said she was on the pill. She said I don't need to worry, but I'm not sure if she was telling the truth or not.. What do you think I should do?