Insomnia Psychosis resulted in Custody Filling

Last month, after several weeks of almost no sleep due to issues with insomnia (not drug-related at all), I went into psychosis. I acted way out of character, causing me to be hospitalized involuntarily. This prompted my ex to file for custody of our 12-year-old daughter. Before this time, I felt we had an almost perfect co-parenting situation as far as focusing on the health and well-being of our child. We had 50/50 custody, and she stayed in the school we enrolled her in five years ago when we moved here. At the hearing a few weeks later, he made wild accusations about me using drugs and harming my kids, which is totally unfounded. He had been journaling for years every instance he could think of, some made up or just gossip (we live in a very small community hundreds of miles from the nearest real city), and it just hurt my heart so badly. I have known this man since I was seventeen. We were married and parented wonderful children for ten years together. I'm just floored, and the reality of it makes it so hard for me to be okay sometimes.