I got a lot of traction on the "feelings" that come with a trigger, when I made a conscious decision to give the reality of the present moment more power than the feelings. It is a decision I attempt to reaffirm every day... To stay grounded in the "now" and not sieze up on the impact of the feelings and give them energy. I can acknowledge them... but if I allow them to pull me out of the present and scare the crap out of me... I'm self harming. (I am not very good at put this concept I use into words, sorry for that).
Most of the time, when triggered now, I can pause, long enough to realize that the feeling has no bearing on my present moment... and I can consciously choose to let it go... the visualization I have used to do it is standing by a river in the fall, there is a tree with lots of yellow, orange, green and red leaves... it is a breezy day and they are falling. I pick one up, examine it... but then I put it in the river and watch it drift away.
I also got a lot of traction with a Psalm, "why so downcast O my soul?"... in the Psalm, there is an example of David, crying out... but then he takes over the conversation and turns his emotional self away from grief, fear, guilt and shame and turns it toward what his strength is... for him it is belief in God. (Please don't think I'm trying to witness here, but I can say that this example has helped me move past triggers.)
Both are a way to validate the feeling without compulsively obsessing it, giving it energy, and ultimately revictimizing myself through self harming thoughts or behavior.