I will also share a number of things that she admitted to me over our relationship
She had/has a very odd relationship with her Dad. Not sexual, but somewhat inappropriate - he would make her feel bad if she didn't come and sleep in bed with her (he was divorced). This happened until she was maybe 14 or 15 and only after her older brothers had an intervention as they were concerned with their Dad's behaviour. He was generally quite protective over his daughter. She has said a few times that she "doesn't remember" some of the things her Dad did to her. I did ask about whether it could be...well you know...and she says she doesn't know and doesn't think so but can't remember.
She has claimed that she hears voices in her head (I kid you not). Not all the time but as a child she started hearing them during incredibly stressful periods (e.g. when her parents split up, etc)
She has said that she depended greatly on his approval or if not his approval, then on him feeling "good" Early on this would manifest in her working hard in school, etc to make him proud (relatively normal behaviour) but then it moved on to her lying about her achievements in order to make him happy - this was especially the case when he entered a depressive period (he seems ok now)
She says she basically felt the same way about me to the point where she still does care about how her Dad perceives her but cares (I guess past tense cared) more about how I looked at her.
If she had known that I would have fvcked someone else so quickly after we broke up, rather than her reconsidering her actions and getting back with me before all this happened she would have instead found a guy and "given him the best fvck of his life and she would have enjoyed it knowing that he was having her body and I wasn't"
There are other things but these are what I can remember of the top off my head. Jesus. When you write it all out she really does look like an absolute psycho...I've never shared this with any of my friends for obvious reasons. I respect her privacy and her sharing these things with me.
Talking all this through has been incredibly helpful. I'm realising that perhaps she was indeed simply...unhinged
My preliminary analyse is that my ex probably is probably Cluster B and shows several signs of
Borderline Personality Disorder
http://www.nimh.nih.gov/health/topics/borderline-personality-disorder/index.shtml
My only issue with this diagnosis is that historically she hasn't really been triggered by "ordinary events" as it suggests here. If she does go crazy it's normally due to a legitimately emotional event (e.g me getting angry and chucking her out my place)