Am I pregnant?

I'm 17, I was supposed to get my period 4 days ago, usually my period is hella irregular, me and my boyfriend have unprotected sex often but he always pulls out and cums else where. Recently I've been overthinking. And today I also gave him a blowjob and then we had sex, he rinsed off but not throughly and he did not pee before penetration... what are the chances I'm pregnant?