Hi Jewguy,
I wanted to join heartandwhole in responding. You are dealing with some very tough and unusual stuff, anyone would be struggling. I think it's very good that you are reaching out and sharing here. It helps to talk about these things with people who understand.
Your ex girlfriend made the choices she did because of a mental illness and a disordered way of thinking. It's very hard to know the best and healthiest way to respond when we are faced with irrational behavior. No one comes automatically equipped with that kind of knowledge.
What I have found is true for me, is when things get this complicated and intense, I need to boil things down to the simplest, easiest next 'right' thing to do. Trying to fix all the problems all at once in one day never works. I need to return to the simple basics. Sleeping, eating, maybe a little exercise. How are you doing with the sleeping and eating?
You said you didn't have any clue what to do. I would suggest what

heartandwhole did. Take care of yourself. Find some one you can talk to that you really trust. Try to slow things down. See if you can find a mental health professional who can help you understand the experience you have just been through. and come back here and let us know how you are doing.
'ducks