pain during sex

My boyfriend came over this morning and we had sex but it really hurt for some reason.. this isn't my first time or anything. He was on top and I was on the bottom sitting up a little. We had to leave at 7 and it was 640ish when we started and he tried fingering me but it really hurt, he used two fingers. And then when he stuck it in I almost started crying because it was really hurting and then he went a little deeper and started going in and out slowly and it was a sharp pain all in my stomach.. this hasn't happened before and I don't know why it did.. help?!!