please help

I just finished my third month on the pill. I've never missed a pill and take it on time (one time last month I did take it 2 hours late). today my boyfriend and I had sex and he came inside me for the first time. I know this is a stupid question but I'm worried that I might be pregnant. I'm about to graduate college in May and having a baby wouldn't be ideal right now but it also wouldn't be the worst thing. I guess I would just like reassurance because I'm stressed about this. thank you in advance