I was trying out a new pair of jeans (without any underwear). Was trying to push up the jeans and my penis foreskin got pinched by the jean's zipper. I quickly got it released. It did not really get stuck and there was no blood or cut (I checked it several times). It was just a sort of a pinch. However, I have had pain in that region of the foreskin (which tends to increase when I lie down) and slight irritation at times. Its been a week and the pain is still there with only marginal improvement. Should I be worried? Do I need to go the doctor?