To avoid the possibility of a nervous breakdown take lots of vitamin B complex and make sure you try to eat healthy even if all you can get is veggies and oatmeal froma food pantry.
I know the numbness you speak of. For me at the worst of times my adrenylin kicks in and I handle it better than little stresses, maybe its a good thing. Just take care of you so you can continue taking care of your kids no matter what. See if United Way can help with the house or other things.
For me the anger at AH got too much and I had to stop letting him back for my sanity.
Hang in there hon and we are here for you