There is no magic cure that I know of. But here is a technique to take the edge off of them. You’ll want to work at making it a habit.
When you feel the trigger hitting, and I mean feel it in your body, immediately put all of your attention on that feeling in your body. Don’t think about the cause, don’t think about the future, don’t think about the affair, only watch that feeling in your body. In your heart, your chest, your abdomen, everywhere. Really feel it. It’s actually pretty easy to do, since the feeling is so strong.
It is incredibly easy to spend all of your time staring at the past when you are post-affair. Triggers in particular immediately turn your attention to the past. You end up rolling around in the stale manure of your memories for minutes and hours. When you put your attention onto the feelings that follow the triggers, and only the feelings, then it snaps you back to the present, to right now this minute. That is A Good Thing.
Those feelings are the manifestation of all of the raw emotions you are experiencing.
Try it. Then try it again. Keep doing it each time you get triggered. You may feel this internal argument along the lines of why you just focused on your body feeling when there are important things in the past that you have to think about over and over and over - that’s your ego trying to take over again. Just keep that laser like focus on the feeling in your body. See what happens.
Sending strength!
DDay 1986: R'd, it was hard, hard work.
“Tell me, what is it you plan to do
with your one wild and precious life?”
― Mary Oliver