I am so sorry you are going through this with your hubby. It is hard to always been the one who is brave and calm when you are falling apart inside. I don't know if that's a mother thing, wife thing, or a dedicated christian thing. But I hope you have someone close to you that you can talk with.
You are in my prayers. I know you are close to God and draw your strength from him. But remember it's okay to lean hard on him and even let him carry you.
Please rest at night. God will stay up and worry for you.
God Bless!