painful sex

my bf and I had sex in missionary, he is a little bigger down there, and i feel like he hits my cervix he bumps something and it causes so much pain and i ask him to slow down, i know we don’t have std we have both been tested negative.. idk if i have endometriosis, normally i don’t get pain.. is this normal? i think he bumped my cervix or went to deep, now i have lower abdomen pain, he feels so bad.. so embarrassing