SKIN RASH SUDDENLY BROKEN OUT GETTING WORSE

I have been to the doctors and they are completely unsure of this, I haven’t had an allergic reaction or suffered acne or eczema in my life, and the doctors ruled all out.

This is from head to toe, and is extremely itching and burning.

I’m suffering hot and cold flushes and am using antihistamine tablets.

I’m in a lot of pain and I’m extremely depressed because of it, it’s lasted 3 days and I’ve been housebound! This is a weird thing to post on here as it’s period talk. But it’s my last hope😭someone please help me xx