Looking for advice!

So basically I’m in college, and me and a guy friend are in a Friend with Benefits situation and we had sex last Friday into Saturday and yesterday (Tuesday) morning (I’m not on the pill but we used a condom) and I was supposed to get my period this Saturday but I kinda got it today it’s very light, and I had cramps for 5 mins and my boobs don’t hurt, which are all very odd for me. My body is like clockwork, my period is always on time, it’s usually very heavy in the beginning, I normally have BAD cramps and my boobs are super sore. So I’m just super paranoid that I’m pregnant and was looking for advice, thank y’all!