Intrusive thoughts

I've always had trouble with intrusive thought but I feel like maybe their getting worse lately. Like, I worked in a call center which entailed getting cursed out regularly, and sometimes its even much more minor things that just really rubbed me the wrong way, I just find myself repeating the conversations/insults in my head for no damn reason. Its usually when I'm trying to relax or irritated about something else and in the same head space I was when I got the insult or whatever. Wonder if anyone has any tips dealing with that?

It feels like a differnt thing but I also have thoughts about really intense pain sometimes. Like imagining what it would feel like if some of my skin got peeled off, or got cut in certain very sensitive places. I'm shaken just typing it out like this, though I can usually put a lid on those thougts fairly easily. The only reason I'm really worried about them is the other night I caught myself immagining in really vivid detail cutting myself, on the top of my arm oddly enough, and in a way it was fun. Like always when I have intrusive thoughts about pain my breathing and heart sped up and my brain kind of went panic mode, but instead of trying to cap it immediately I let it go on a few seconds, continuing to imagine it. It was exciting, but more I think it was the feeling of rapidly calming/coming down immediately afterwards that I really liked. I haven't done it again since and I realize its probably not a healthy thing to do, honestly I'm not even sure why I'm typing this out. Maybe out of dim hope that someone will tell me its a perfectly acceptable way to face my fears, I think that's how I got the idea to try it in the first place.

Anyways if it helps I'm already on prozac, plus some daily anti-acid drug for GERD. Appreciate any help you all can offer.