First off, if it hurts to have sex, wether your cut or not, somethings wrong. Get that checked out.
Not to be rude, but that's wrong. My foreskin used to hurt when it was pulled back, but tht's because it was just generally tight. Is the pain near the base of your penis but above your scrotum? (if that makes sense). Sounds crude but knock yourself off regularly for a couple of months and as we all know, skin stretches.
Hope this is of help, i used to get really worried about it when i was younger.
Peace