Pregnant?

Mariah
So me and my bf had sex while I was ovulating. Well when we went to go again right after he went neither of us really cleaned him off. So could I be pregnant especially if I was ovulating? I have been nauseous for weeks already and craving stuff I don't like I've been pregnant before the tests were always negative then I had a miscarriage. So I'm scared it's going to happen again. Just some advice is all.