OK, so this makes me a little nervous... I was messing around with my girlfriend this afternoon and while going at it i heard and felt a POP sort of at the base or just behind my dick. She asked me if that was my knee popping. Thats how loud it was. I went soft and had to work at it to get it hard enough to just finish. Then the pain set in. It wasnt a horrible pain, but more like a bad aching just beyond the base (inwards) and tingling in the head. Its been about 7 hours now and i still have the aching... have i f'd up my dick or is this nothing to worry about?