Can’t sleep again, so itchy!

I have laid here for hours trying to sleep but I literally keep itching and my scalp feels tight and sore. I only briefly had my hair up in a high bun to go in the bath earlier. It can’t be pulling on my hair roots now because it’s in a loose braid. I have had the most horrendously itchy skin all night which hasn’t helped me settle. I was tired so now I’m really grumpy because it’s prevented me from sleeping. I don’t know if it’s allergies or whatever, but it is so annoying. I just want sleep at the normal times, but it never happens. I’m fed up. I got this many months ago before I quit drinking alcohol on a daily basis. I’ve never had it since and never thought it would come back after cutting down on alcohol a lot.