I relive moments from my past all the time. Random moments, too. It could be something harmless from my past like running an errand, or a time I got into a fight with my ex-wife. I've learned my mind has a mind of its own and will pretty much decide what I think and when I will think it regardless of what I try to do. Medication helps level me out so the thoughts aren't always racing but I keep finding myself caught up in some moment of the past, reliving it in its entirety or trying to improve the situation and change the outcome.