Deep thrust hurts...

So I lost my virginity few months back and it’s not very long that am having sex with my man.. we kinda do it once a week but when we do we go on for 3/4 times or more for the entire day. So after very few intercourses, we’ve been trying a lot of sex positions at first it didn’t really hurt and everything was normal but the last few times in certain sex positions whenever he goes deep I feel unbearable pain like I’m almost gonna cry and it’s just not possible to take it anymore. Can anyone please tell me that is it just me or it normally happens?! And how can i cure it.