Lawsuits and divorce are very stressful and is a normal cause for depression. I went through something similiar a few months ago, and depressed the hell out of me for months. After it was over, I felt so high on life again. You and I have the kind of personalities that are prone to not dealing with stress well. Our natural inclination towards stress is depression. My friend has a different reaction to depression; he gets mad at it. It helps him out. I've tried that route, and it seems to be working for me too.
Take it one day at a time. It'll get better. Find a good therapist that deals with depression and anxiety. Then find some goals to work on.
