I had already written on here asking about if it was possible for my girlfriend to be pregnant. As I said before, she is on a very strong birth control pill but had taken two amoxicillin pills over a weekend. We had sex on sunday without a condom for about five minutes. I didn't ejaculate inside of her. I was stressed for a few weeks, waiting to see if she got her period. We got some of those First Response Early Pregnancy Tests and took one in the morning five days before her missed period, the next in the morning two days before (when the accuracy was supposed to be 93%, and the last she took in the evening a week after her period started, all of which came back negative in about a minute and a half. She got her period on time and everything was normal. I was just curious if there was still any possibility that she might still be pregnant. I'm probably just worrying about nothing, but I didn't think it could hurt to ask.