What does this mean HELP??!!

So me and my boyfriend have been having sex.. The first time we had sex was November 1 well like last week when we where having sex it started to hurt like normal sex not going fast... It felt like he keep hitting my uterus wall ... Like I've had sex before him and it never hurt .. I should also tell u that I'm not on birth control and we don't use condums he just pulls out ...well today when we were having sex every time he would try to go in it keep hurting Cus it was hitting my uterus wall..like I started crying .... Even now it hurts...what's that mean and I pregnant