Worried

Hi. So I am on the birth control pill and my boyfriend and I have unprotected sex. We have been together for 5 months. I had my period about 3 weeks ago and 2 weeks ago my boyfriend and I got a hotel room together. We had a lot of sex then but he pulled out everytime because it was on my stomach or my back. Acouple nights ago I stayed the night with him and we tried new positions well ever since then my stomach has not felt normal and it’s bloated and hard. Could I be pregnant or my abdominal area is just swollen from all the rough sex?