I think I’m going crazy

So my boyfriend and I are currently long distance and on this past Monday we had a night of passion when he came to see me. I haven’t been on birth control because I was waiting for my next cycle, and I don’t remember the day of my last period, but I would’ve been around the 3rd week this week (ovulation time). I’ve been feeling twinges in my pelvic area, and almost like a heaviness - different than period cramps. I’ve been eating everything in sight and having major cravings as well as feeling super exhausted all the time. My nipples are also very tingly and sensitive. Is it possible that if we had sex and I ovulated on the same day that I might be pregnant? I just have a really strong feeling I am, but I’ve been wrong before.