What do you think?

For some reason my last post isn’t showing up.. but anyway I was wondering what this sounds like.. My last period was on 1/17 and I’ve always had a normal period, it’s like clockwork every month. Anyway, according to mymonthlycycles.com where I usually track my period among other things and it said that I was due to ovulate on 2/3 and I had unprotected sex that day as well as a few days before.. so the past few days my breasts have been sore on the sides and I had some slight uterine cramping which is not normal for me. Is it possible that I am pregnant or is it too early to tell?