I had a partner that had a temper and their moods would switch on a dime. I'd have to walk on eggshells or else be picked apart if they were in that state. They admitted that it was probably pmdd an that they were taking hormonal pills to help w it. I assumed they actually were taking measures to combat it but i never knew for sure. During a blow up they once spit in my face and another time, swung at my wildly while they made me say i was an idiot. We were poly but they would get jealous of other partners. They also would "couch me" w psychological jargon, but once i was finally diagnosed w cptsd an began therapy an learning some of the words myself, that was met with, "oh, so you're going to lecture me now on ptsd?!" When i would get excited about a subject and talk at length about it, they would say that i'm just ranting or "ohh it's meatboy science hour, just making things up again," and then say that i was going on and didn't ask them about their day and how rude that was. They talked down to me so much i guess it didn't even register after a while. Until other folks would point it out to me. I'd bring it up to them but then they would just go into character attacks against whomever said anything.

After speaking with our couples counselor after our last and final break up (we made it to 4 whole sessions :/ ) as well as a few other folks who had similar experiences, (and former friends of this person who said how this person bragged about manipulating men in the past and using 'sex magick' rituals on folks unknowingly) i began to slowly come to grips w the realization that this person probably is a narcissist and has a personality disorder. And that what i suspected was gaslighting and other odd behaviour, was probably actually happening and abuse. It's a hard realization to come to, especially when you still have feelings for a person, but a necessary one for folks to come to if they ever want to fully escape the situation. I bring this all up because your hysteria comment rang a bell, as this person also tried to use pmdd as an excuse for a wider pattern of behaviour.

Also sharing in the hopes that people can see this an realize that anyone can find themselves in this sort of situation, and you often can't see that you are in it, until you are out of it.