Help for a single mother?

My husband and I decided to adopt. We had a great marriage, secure life and happy family. Went through the process and were place with two daughters out of the foster care system. It was awesome. About 5 months after they were placed with us he told me he didnt love me anymore and had been having an affair for the entire previous. Even while we were being certified to adopt. I moved home to my family with my kids and he said he broke up with mistress. I couldn't raise the 4 kids (I had 2 sons from a previous marriage he raised since they were 2 and 4 as his own). He brought the girls to live with him to help me out and I would have them on the weekends. Now his mistress has moved in and they will not let me see the girls and he has cut off all contact with my sons (broke their heart). I can't afford the fight, mentally emotionally and financially drained. I was ordered to receive settlement on the house and he decided to have it forclosed. I can't pay my bills and am having to file bankruptcy because when we met he had to file bankruptcy because of his debt from previous marriage. So, all my credit was used for purchases even though in divorce papers he committed to paying those bills he isn't. I miss my girls so much and I adopted them forever and now this crazy woman controls the situation and has left me voice mails asking me to leave their family alone. Its crazy and I need help. I guess this is where trust can get you. :( Is there any place I can get help? (all this was in Houston TX but I now live in Louisiana)