I'd really caution you to retain an attorney ASAP- particularly one with experience with mental health and custody issues. Make sure you get that cream of the crop- you are going through a major game changer right now.
Take care of yourself! I can tell from your other postings- you have a big heart with others- just not for yourself. Keep us posted on how you're feeling- there's a number of people here who can listen to you and help you get through this situation.
I'm also going through a support group- DivorceCares. It's at a local church so there is some religion sprinkled into it- but it may help you to be around people facing similar challenges.