Does anyone experience this, and have advice for overcoming this problem.

I keep obsessing over experiences that ive had. Over and over and over and over....you get the idea. I will go as far as to stay STOP to myself but the thoughts just trickle back in.

I don't want to go into much detail about what is bouncing around my head, but most of it stems from a bad relationship i was in years ago, so im sure you get the idea.