Tell your lawyer about his threatening with the insurance. She can file to stop him from removing you until the divorce is final. You are also eligible for COBRA through his insurance when you are removed from his policy after divorce. That is a federal law and you can pay for coverage through COBRA for up to 3 years. He's bullying you plain and simple. He can't just drop you without you knowing.
I know the money stuff is terrifying. If you had a full time job, could you afford the house? Do you want to stay there or maybe you'd like to start over in a place that is just yours? With how your H is, if I were you I might want to live somewhere else because he seems like the type to always think that place is his.
Focus on what you can control. Custody and visitation is fluid and can always be changed if the situation warrants it. Your S is old enough to tell you if H mistreats him. Just keep an openness with S so he knows he can come to you if anything is bothering him.
Stop beating yourself up. H is making you abuse yourself when he can't be there to constantly do it. Hugs.
Me38,H:38,S:7 Married:6/99 Bomb:7/04 Sep.:5/05 D Filed:3/08;Final 1/10 Piecing:11/09 H moved back:09/10 Current thread: http://tiny.cc/htcty