Hey bud. Hang in there. I was told not to leave the house by my attorney. Some people do to alleviate stress but sometimes it back fires. You need to be all business now. I am in the same position and didnt want to be the one to leave the "family home".
All u can do is take care of yourself. Live the mantra "you do what u need to do and I'll do what I have to do". Whenever she throws empty threats of filing at you. And I do believe at this point she's bluffing. Even if she does the initial filing it's just the very beginning stages and takes a long time if u want it to. Just stop fighting. Let go of the rope. I know it's easier said then done. We're all there. But just stay calm and reply "you do what u need to do to make u happy. I'm not going to stand in your way of happiness". Just by saying this will give her a false sense of control/security they are needing right now. Let her go do what she needs to do. Until u do this she can't begin to really figure out what she wants. As I writing this I'm applying this to my sitch ;\)

Good Luck. B