Hello i have a problem with a fishy smell on my penis. after unprotected sex i noticed that even if i wash on my penis foreskin it smellslike a fish.?

Do this: It isn't coming from the hole in the penis. If that smell hits you it creates a powerful mental impact. Place a lotion on the penis, forget about it. It probably happened after intercourse, was from the vagina, and created a mental impact; most likely, i could be wrong, we can always be wrong, but it freaked you out now you can't stop thinking and worrying i bet.