Pregnant?

Me and my BF have had unprotected sex frequently he came inside me all of those times I was supposed to get my period 7 days ago and I still haven't got it but I don't feel weird at all or any other symptoms. I been having unprotected sex before too and he would always cum inside me but for some reason I never get pregnant help could it also be that I'm not going to be able to have babies I'm not trying to have a baby just yet I'm just scared that I can't have babies later on since I never get pregnant