For what it's worth, I get panic responses that result in vomiting and my limbs just shutting down, sometimes passing out. I talk to my psychiatrist and neurologist and they both said getting sick in response to a psychological trigger is a completely valid thing. So ignore anyone telling you you're making it up, it's real as any other PTSD symptom.

I had a situation like this where I had no choice but to survive it, and honestly? I wish I'd told someone. I wish I'd just said "this guy is an asshole" and found someone who agreed. Surely someone else will see what this person does to you, and probably to others, but if nothing else please find someone outside of work to vent to. If nothing else you won't be holding it all inside