By triggers I mean reminders of my H's affair, the depth of my self mistrust at being so totally clueless, etc will crop up during the day and blam I'm in a surround sound, 3-D experience. It's getting a lot better but still a problem.
What works best to get over it is when my H helps me through. What works best on my own is 1. breathing, 2. having the best nonchalant attitude I can muster, "this is nothing really new", "just like the last time you realized what was really going on in some experience way back when". etc. 3. patiently waiting for it to pass and 4. finding distractions.
Your way with words makes me smile. Like your make the day special approach!