Oh my God, this sounds horrible! I am so sorry! I know you said you'd been feeling poorly, but I had no idea it was as bad as this!
That sounds horrible. I have no experience in this, but wish you some relief and some peace.
So sorry to hear this. I hope someone can give you some useful advice. When shingles was doing my head in with the mad itching, I was prescribed atarax, (hydroxyzine). It definitely controlled the itching, but I could only take it at night because it would instantly put me to sleep. I would at least request something for that, so you don't have to suffer the effects of no sleep on top of everything else. Steroid creams offered no relief whatsoever. Hoping you find an answer.