Op 
I suffer as well and lack of sleep magnifies a hundred fold, I really feel for you.
Definitely talk to your gp. Can you self refer also to your local IAPT service? Mine had a bit of a waiting list but they're being really helpful now.
I practice a lot of self care / self soothing when my anxiety is high. Eating regularly, proper food not rubbish. Avoiding alcohol, getting outside in the fresh air daily, even if just for 10 minutes. A walk often helps to burn off some anxiety for me.
I listen to podcasts and audio books a lot, I find books can take too much concentration and tv is rubbish these days. Listening to something instead gives my mind something to focus on without being overwhelming and i often find the voices of those speaking quite calming, as if i have non obtrusive company.
Headspace works for a lot of people, there are also guided meditations on YouTube. Ones that involve gentle chanting are really useful if you struggle to clear your mind (see kirtan meditation).
I prefer nature sounds myself, like birdsong.
I found this article useful the other day www.theguardian.com/lifeandstyle/2022/may/21/what-i-wish-id-known-about-living-with-an-anxiety-disorder
You'll get through this, op.