How can I get legal aid for my divorce?

I'm in the preliminaries of my divorce. Ex has custody of our 13-year-old son and is cohabitating along w/ her child. I lost my job recently due to all this mental stress. I do have a history of depression, OCD, anxiety and panic attacks. Ex is using this against me to remain in control. My attorney has withdrawn from my case. I have spoken to legal aid and no services are offered in my area, Lincoln County, MO. I am almost homeless. The marital debt was 90% in my name and I was forced to file a chapter 13 during this process. Ex still has over 85% of the marital assets and refuses to relinquish anything. I have a 401k and savings plan through my job, which I can not touch until the divorce is final. We went to mediation already and devised a parent plan, only on the basis if I reside here. My entire family lives over 1,000 miles away and I have no family or financial support here. I am lost and dont know what to do.