Pregnant... maybe? Pre-cum? Cramps?

I am 18 years old and I have just started having sex about a month and a half ago and me and my boyfriend usually use condoms but sometimes we slip up and don't. Recnently, we did it with a condom and he came for the first time. After that, he says he peed, but about 2 hours later, we did it with no condom, but not for no more then 15 minutes, and we did not come. But this was about 5 days ago and recently I have been feeling cramps and my period doesn't come for atleast 2 more weeks... this is making be very emotional and nervous but I don't know what to do because I am a college student and this isn't how I wanted my life to be... could I be pregnant?