ouch 😭

Tiera
I'm 18, and have only had sex with two people, my first is my sons dad and my second is my soon to be hubby. 
Well when I had sex with my BD (he has a tic tac dick) it HURT! 
Now with my hubby it STILL hurts. It only hurts when we're having sex. I don't know why. My doctor said after the first couple of times the pain should subside. But, we have been together for a while and have sex frequently. 
Why is it hurting?