I'm glad you have your T for support. I went through a divorce a couple of years ago and the support and help of my therapist were invaluable. I don't think I could have done it without him.

I second what MUE wrote--work on building a support network. See the lawyer to get info and don't let your spouse know for now. Have a plan and get done what you can before breaking the news. Build a network, become familiar with your finances, copy any important documents, etc. Above all, stay safe. If you can't get all this done before telling your spouse due to safety, then just bail on it and put safety first. Good luck.