I'm sorry to hear you're going through this. My advice would be to hire the best professionals you can to handle the legal side of things. Educate yourself about what they are doing and why, but don't take it on to do it all yourself.
Do whatever you can to step outside the madness every once in a while. I found it was really important to have friends or activities which can help to put this mess in its proper perspective. It is awful to go through, but it does not define you. It's easy to get sucked into the crazy - the anger, anxiety and high emotions that addicts manifest can be infectious. If you have something to do which completely occupies your mind so that you don't think about this, even just for a few hours, that might help. For me, one of the components of my job is delivering public lectures and when I'm doing that, I am completely "on" and concentrating on what I know I do well, and nothing else. This was really useful during the worst days of the divorce.