Hi~I am so sorry you are going through all this suffering, I can imagine how frustrating this must be for you.
Have you tried to see a Naturopath? They can sometimes come up with ideas and diagnosis that the main stream doctors haven't even heard of. If there are no Naturopaths in your area, then I definitely would seek a second opinion from another GP.
I am thinking a few things that you may have that have been over looked. One may be Candida, this is a yeast infection that starts in your guts, it causes almost every symptom you are having. Here are some links and symptoms about it, I looked at it and it sounds so much like what you are going through.
Many of the articles do offer resources to buy products from, but, you don't have to, the articles are what I am interested in and I think they will help you.
Have you been tested for food or chemical allergies, they can cause some of what you are going through as well.
Fibromyalgia can certainly cause all your symptoms too.
I hope some of this helps, not knowing what is going on with your body can be so scary, just knowing helps to relieve the stress.
Hello, have you checked your gut? I have had all of your symptoms plus very bad migraines, vertigo to point that I could not walk on my own, night sweats, itchiness, sleep disruption. After spending years at doctors, finally found one who suggested I had histamine intolerance. After one day on a low histamine diet, 80% of my symptoms were gone (no kidding)! Then the doctor told me to do a stool test and there we found out I have one type of streptoccocus that is pretty scary and a very low levels of good bacteria :( A lot of gut permeability has been suggested. The gut cannot fight pathogens entering the blood stream. With that come all the symptoms. The gut health is so important. Now starting some supplements that have a great reviews (one of them is TAIGA A320) and will have to be on a low-sugar diet, lots of leafy greens and bone broth every day. Good luck with your healing. Maybe look at the gut health too.