Heather, I am so sorry that you are having such a tough time right now.  What I would suggest is that you try calling your county's social services department and tell them about your situation.  You shouldn't have to put up with abuse of any kind.  Is your husband abusive to your kids?  And I know that having kids with ADHD is a real challenge - are they getting help at all?

Also, here is a sharepost written by Merely Me about how to get help when you have no money or insurance.  You need to take care of yourself or you can't be of any help to your kids.  You need someone who can be supportive to you.  Maybe you should think about going to a women's shelter to get away from your husband.  I think it's very hard to reason with someone who is abusive like that, even emotionally abusive - sometimes that's worse than physical abuse.  It's no wonder you feel depressed.

I also want to give you this link to HealthCentral's ADHD site, which you might find helpful for dealing with your children's condition.  I hope you'll feel free to reach out here any time.  Please take a step toward helping yourself - you deserve to live in a safe place and so do your children.  I hope you will let us know how you are doing.  I will keep you in my thoughts and prayers.