Need y'alls help

Sooo me and my boyfriend were making out and it got heated and he went down and gave me head then he fingered me and it REALLY hurt , he was going really deep and hard and with 2-3 fingers and I've never had sex before... ( well till today) now my stomach REALLY freakin hurts and my head killing me , it was a couple hours ago, are these to things related? Please help , and please be nice .