getting nutted in

So today my boyfriend nutted in me for the first time. I'm not on birth control and I know that was really irresponsible. I'm suppose to start my period on Friday and I've already passed my ovulation day. What's the chance of getting pregnant?  UPDATE GIRLS: I'm grown and not ignorant af. If I was pregnant I'm not worried. I just wanted to know what y'all thought but I don't need it from some of y'all rude ass children.