I have learned a few things going through my own horror show of a life. Do not leave your home. Obviously if you feel threatened b6 him, there are other options, but it doesn't work out well for the one who leaves the marital home.
Contact a lawyer, or a few. Try to find a free consultation. They can clear so many questions up for you. Also, once your name is within there documents, he cannot be accepted by that lawyer. Keep it to yourself about contacting lawyers.
Get support from family and friends. It will give you the strength to do what you need to do.