Focus on looking after yourself fo now zeppo.
I found hot baths helped me through withdrawals, particularly with the constant itching. Going for walks helped clear my head ever so slightly as well.
It's brutal but the fog does lift, as you know.
Please see the doc if you start to feel worse. They can give you stuff to help you detox at home if they think it's required. I was on diazepam through my last detox. It was the worst I've had by far and I'd probably have either drank or gone insane without it through the first few days.
Edit - Just saw you got an AtIvan script. That should help you out.
Take care
B