Mo, your husband isn't going to help you. He isn't going to cooperate. He's going to try and do everything in his power to make you return to the fold or, barring that, to give you and your children as little as he can.
You clearly need help and support, and someone who will listen to you. Keep talking here. Do you have any friends or relatives who could come for the weekend (or could you go and visit them for the weekend)?
I honestly don't think you need ADs. Of course you are sad and anxious -- how could any normal person not be, in your situation? You need support, NOW. You must be feeling so lonely, poor thing. Keep posting here if you feel like it. But please look for support in real life too. This is an emergency.