Am I pregnant?

I don't think I have ever been so nervous before, I am 16 years old and my boyfriend and I have had sex without a condom 3 times during the course of one week, but he did not ejaculate inside of me or even come close to it. He was inside me for under a minute and kept pulling out. We did it July 1st and 2nd... I was supposed to get my period on Sunday, July 5th but I haven't gotten it yet. I took two pregnancy tests today and both came out negative. Do you think I'm pregnant?