That is quite a story. I can understand why you'd be depressed. I think the first task for you is to regain your confidence and improve your outlook on life. I know that seems impossible right now. But, if you can remember back when you were a kid when you'd wake up on a Saturday morning and you'd be excited for all of the possible adventures that can happen that day. You need to regain that sense of adventure. You've been given a lot of lemons; it's time to start making lemonade. You're on a hero's journey to save yourself, your children and your marriage. You can fall apart or you can decide to dig deeper into yourself and find the strength you never thought you had and go out and fight the good fight. You can quit or you can make it an adventure; it's up to you to decide which direction you want to go.