Painful sex

Okay so i've been with my boyfriend for about 6 months now , & at the beginning the sex was GREAT ! first man to ever make me orgasm but for the last 3 months we would have sex i'll have a orgasm & when it's time for a second round my vagina would hurt really bad , when he would put it in it would feel like a little rip on my vagina , he would have to pull out and go inside a certain way for it not too hurt , AND i haven't gotten my period for about 7 months now or maybe more , (i am not pregnant) but i only bleed when i have a orgasm is that even normal ?