Goldenfish, I'm not Silverleaf - but I did have those exact same symptoms as well and it was hell and, like you, doctors could find no cause (and I saw a lot).
It was only when - all things excluded and with nothing else to do or try - we got my estrogen up considerably on HRT, that it all went away (almost). I am now on 200mcg patches plus 4 pumps of gel and finally this hell seems to be coming to an end. I'm pretty sure it was all hormones and not thyroid, but due to trialling some thyroid meds (part of my attempts to try everything), I failed to recover thyroid function when I came back off the thyroid meds. So I've had to go back on thyroid meds as well now. But I don't think thyroid was the cause of these horrific symptoms for me, originally.
If you have not tried HRT and above the licensed dose, then I would strongly recommend that. You will need to go to a private menopause clinic like Newson Health.
My reasoning was that, if it didn't work, I would just come down on it again. But it was something which had to be tried - like everything else.