I am an uncircumcised male and while I was beginning to have intercourse, my foreskin, which has never been able to retract over the glans, got retracted all the way back. It was in pain at first, but I am wondering if there is any need for concern or not. I am just having mild discomfort but it has only been about 10 minutes. My penis is not erect and I am able to move the foreskin back above the glans, but it retracts about halfway down.