at my wit's end

i have dreadful dreadful death-wish inducing eczema. it's ruining my life and i don't know what to do.
i was a fairly allergic child. i had skin problems from a young age - some babyhood skin thing and then eczema all the way into my teens. it was generally only behind my knees and elbows and was manageable with the right ointment. as i grew older it seemed to disappear (other health issues raised their heads at this time - chronic fatigue syndrome, fibro myalgia, irritable bowel syndrome, etc etc.) but the last couple of years of teenage-hood were relatively healthy. i entered my twenties feeling better than ever. then.....
i got sick. the doctor was sure it was glandular fever, but the tests came back negative. no matter, i got better. but then, bam! every couple of weeks/months i'd get mouth ulcers, swollen glands, lethargy and then pick up after a few days. i'd never really recovered from irritable bowel syndrome and it got worse att his time. and then my skin started playing up. what started as small eczema rashes spread to cover pretty much my whole body, and dry skin on my face and back was unbearable. i saw an allergist, who confirmed what i already knew about my allergies to peanuts, dust and random grasses, pollen and mosses, and added latex and all pulses, legumes and beans to the list. he put me on an elimination diet, which made things worse. he sent me to a gastroenterologist to see if i had caeliacs disease. nope. he did little else so i went to a naturopath who put me on other diets and strange homeopathy remedies and so many supplements i lost count. nothing worked for my skin, though my other problems disappeared. i'm off to see a dermatologist in a few weeks, but my skin is worse than ever and i'm going nuts. i take fish oil tablets, use an oat based moisuriser and bath powder, and i can barely leave the house due to the pain. i don't know if i can even last a few weeks.
i apologise for such a long post, but i figured the more known the more likely someone could help me. is it dustmites? is it what i eat? see, it comes and goes to a certain extent, amd i don't change anything....i don't understand it. could it be hormonal? should i stop eating sugar, or wheat, or take different supplements? is there *any* quick fix for dry skin? or slow fix? i can (just) live with the rashes, but the dry skin is destroying my life. sometimes i can barely move my face muscles.
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