Are the triggers/images you receive all negative? Are they all about your H's affairs?
I really don't get many to episodes from my W's previous activities. What triggers me is more of my previous overdependence on W's health and state of mind. I became so dependent on her that I would have sympathy illness when she was sick. If she was down, I was down etc... Not a real healthy situation as I know now. Every now and then (like last night) I find myself slipping back into that old evil pattern. It's gotten to the point that I recognize the feeling when it starts so I can remove myself and deal with it alone.
I still think it's a shame that you can't rely on your spouse to help pull you up. Sometimes they can. Many times, they don't have a clue. Better to deal with the problem on our own than overburden our spouse.
Having a great day so far. Ordered W her bday present, got her a card and enjoyed a little sunshine at lunch. Hey, the tulips and daffodils are breaking ground. Crocus should be blooming in a few weeks.