Oh goodness yes, exactly. The feeling of panic, sick to the stomach, cold sweats, all of it.
I think, for me, it's PTSD SteppingUp. For so long I lived in extreme stress, walking on eggshells, feelings of dread, never knowing when the next shoe would drop. I STILL can't tolerate raised voices (and my AH didn't yell) or confrontational situations, but I'm getting better at it.
I don't know why my STBXAH makes me feel that way, to this day. I don't want to look at him, much less speak or deal with him at all. I get the same physically ill feelings just thinking about it. If you get a chance to discuss this with a therapist, do let me know what they say! lol
You are not alone.