Yes have had tests for thyroid outside the usual ones too but as you probably know doctors won't do anything about them if they're within range although I think mine isn't primary hyperthyroidism. I have been on Thyroid UK although some on there cab be pretty dismissive of Fibromyalgia on there and Chronic Fatigue which we do get a bit tired of, but hopefully that isn't the case in this forum. The symptoms are just as debilitating whatever is causing it. The jury is out whether it is undiagnosed thyroid disorder, it certainly might explain some cases, but not all. It used to be known as Fibrositis. ME, Fibro, MS, thyroid issues, Lymes Disease etc all have so many overlapping symptoms so it's not always the GPs fault and some of them recognise FM and ME which is good. But the problem with debilitating fatigue is having the energy (never mind the finances) to pursue all the options to rule out anything else, although I have done my best and continue to do so when I can. I have spoken and emailed to an endocrine nurse several times although she didn't dismiss FM.