I can totally relate to what you are experiencing, I do the same thing. I'm stuck in the past and keep replaying the past over and over again in my head, which makes me end up "living in my head" all the time. Replaying past events. I'm stuck. Just like you. I don't know what the answer. Perhaps therapy would help me. I have the same dx. as you. I suffer alot from severe anxiety, more so than depression. I was treated also for PTSD following a heart attack. You and I definitely have to stay in touch.