Ok, this is good because you are talking through your reactions. What that means is your conscious mind is recognizing your reaction to this clearly big trigger. Forget about snapping at the telemarkerter, but, that is yet another thing you did "express anger" that again is your conscious mind becoming aware of.

A trigger can cause someone with PTSD to react "before" they consciously make that choice. By noticing your RE-act to a trigger and verbalizing it, now your conscious mind has acknowledged the RE-act itself. That is the beginning of recognizing what you eventually will be taking the next step towards controlling.

Ok, yes you saw this person unexpectedly, major trigger I hear you. You drove away until you could react to what just happened. Ofcourse you also remembered instantly how this individual caused harm to you in your past. You talked about that too, good again. I understand that it makes old wounds feel "fresh" and in the now, but, you are not being hurt "now", you are only remembering and probably feel the age you were.

Please understand that part of this is what we are meant to do because we need to make sure we avoid danger, significant for our survival. If PTSD is part of the challenge, it's harder because these memories are more intense, but in time you can learn how to reduce these affects even though right now it doesn't feel that way. Try very hard not to feed into these symptoms and tell yourself to be upset ok? Acknowledging is important to healing and controlling, but do your best not to retraumatize by thinking what happened in your past is in the now ok? A trigger is a huge question, "is this happening right now?", your answer is, "I remember what happened, but it's not happening right now". That actually helps to reduce that power of the trigger and that is always a gain.