Do not discuss ANYTHING with your WH. Copy those financials and put them in a safe place. Do you know where that stuff is?
Stay on the high road.
Communicate in print. Type every word as if a judge is reading it over your shoulder (don't remember who said that here on SI, one of the best things I've taken away from here).
Lawyer up. Some will offer free consultations. Google "questions to ask a divorce attorney". There are things you should ask about billing, what percentage of their practice is D, etc. during the consultation.
Document, document, document.
Take care of you.