First off, if it hurts to have sex, wether your cut or not, somethings wrong. Get that checked out.
I was recut at age 29 years old because they fucked up at birth. Still didn't hurt, just wasn't pretty. When they cut you they put stitvhes so you don't extend when you get a morning erection. That is to prevent from tearing while you heal. I freaked when I woke up and I felt hard and when I looked down, Mr Johnson was little johnnie. I was about 5" around and about 2" long. Called the Dr and ecerything was ok. Took about 2 weeks for stitches to desolve and everything was fine.

Side note. The first few times having sex with new skin exposed was like over the top.