My name is Marc and im 15 years old. I went to pee tonight and i looked down and there was a knot on my scrotum and there was blood over the knot and i whiped it off and there was a small hole there and it kept bleeding. I don't know what happened, i thought maybe that i zipped it up in my pants. But, now (about 30 minutes later) the knot is quite large and it feels oily. I don't know what to do but i dont think i need to go to a docter. Please help