Help:(

So a while back ago when I was in a relationship for a while and we obviously had sex after a while, so there was a problem where I was in pain during intercourse like certain positions hurt me, I cant sit all the way up when I’m on top and I didn’t know how to fix it so time goes by we break up and I recently started hooking up with this guy we’ve only done it twice but I realized that the same thing is happening with him it’s getting to the point where I’m starting to get insecure or I’ll just suck it up and deal with it any advice you guys can give me:(