I'll post an update for myself. I try to tell myself, I've got better boundaries and better processing abilities and I can wait until I see more on the situation in retrospect and just try to trust that it's a normal enough situation and that whatever other people were saying or doing that made me feel tense and "triggered"/emotional flashback like that, it in reality doesn't have meaning, like maybe they didn't seem to accept my expression or something and then I react that way (as an example) and then I'm like I expressed or felt (even without expressing) what I felt, not more, not less, others cannot judge me for it by their unfavourable-seeming reactions. I can own what I feel and there is nothing wrong with what I feel even if others don't accept what I feel (I am not talking about the trauma trigger feelings. This is just an example of what leads to triggers). And I'll try that the next time such a trigger happens and see if I'm able to calm down fast from the tension then