Advice needed.

What do you do if you feel like you might have done something that some may regard as somewhat bad, and you kinda hate yourself for doing it and you don't feel sorry for it though. Like, even if you've covered all your tracks, or at least you think you did. It doesn't seem good that any feelings of guilt one might have is eliminated if they can't get caught. The logical answer would be forgive and forget but it doesn't seem that easy. Its almost like i want some retribution to happen, but that is the one thing i fear most. I pride myself at being able to weasel my way out of a situation, but then i don't really pride myself on priding that. Help! PLEASE!