I recently got back from my girlfriends house and we had fun but we didn't have sex but I spent time of excitement with my penis but she didn't have time to finish it for me so when I was going home I had blue balls and it hurt so I was going to wipe the slate (masturbate) but as I was doing it I couldn't get it up and it was tired and a bump came up on the side of my shaft is that a bump full of semen or is it an STD, I'm not going to die tomorrow right? Just want to know if I need to see a doctor I'm 16 don't want to talk to parents about it?