i am 16 years old and had pulled my foreskin back and had an erection... i was with my girlfriend for about an hour and a half kissing and just playing around with each other. i later went home and noticed my foreskin had swollen behind the head of my penis so i pulled it back up and now i have part of my foreskin swollen and i cant get an erection!!! will this go away on its own or do i need to get medical care?