Plasticat: So sorry that you're feeling so defeated.
Working so hard, hoping and then having your hopes dashed is so dificult, the stress and sadness of this rollercoaster will also contribute to making you more sad and depresed. The reason, all the stress depletes your adrenals which in turn will cause a load of new problems for you.
I am sorry to say that I have not read your previous posts, so you may already have looked into what I thought might be a possibility.
Reading your post, it seems to me that you may have a form of autoimmune malfunction?
I did a very quick google search and a couple of things popped out immediately, if not these maybe a different manifestation?
They mention thyroid dermopathy, lupus, and others showing the similar symptoms as you describe.
Here's a line about lupus: "Discoid lupus erythematosus (DLE) is the second most common form affecting the skin only. It produces a red, scaly rash which can appear all over the body and leave scars."
Please do know that I do not know the site, but you can maybe get ideas there?
Also, too many cleansings and restricted diet may deplete your body of necessary nutrients. I would say to listen to your body, it speaks. when you find a webpage or walk at the market and there is something it wants it does let you know: That's it.
Like when I go shopping, I'll just have to get those nice orange carrots, or those great smelling herbs, or that chunky head of garlic. Same with protocols, some things were great, while some made my feet go numb!for months! until I revised what works and does not. Know what you started when, and what changes around that time.
Well, hope you find some solace, some hints and pointers.
And if you can - get a kitty cat or a dog. They fill your spirit.
PS: things I consider indispensable:
fresh lemon juice
B12 methylcobalamine sublingual
a good food based multi
celtic Sea Salt
Pretty clean varied diet