Weird Rash

One night I woke up at like 3am and found I was super freaking cold.. But as soon as I was fully awake i also began to notice that my side was burning like hell!!!

A sharp stinging pain literally right under my skin!! I freaked out and since it was dark, I pushed my husband abruptly to wake his ass up!

I was going bezerk!! Like i didnt know what was going on! So after my hubby woke up i told him my skin was on fuckin fire! He quickly grabbed his phone and turned on his flashlight and he said

"Holy shit"

WHAT!!!

WHAT IS IT!!!

WHATS WRONG???

I'm trying to figure out why the hell my skins burning and I'm literally crying at this point.

He takes a picture and this is what i see

I went to the Dr the next day and because it looks like heat rash I asked if it was. He said

NO...

(SO WHAT ELSE IS IT)

I went to a dermatologist. They don't know what it is.

So here it is 4 months later i still have this thing AND ITS FUCKING SPREADING!!!!!

It's all over my back!

Now on both sides!

Idk what to do!!!

Does anyone know what this is!?!?!?!?!?

Recent photo^^