You have been diagnosed as having hyperthyroidism
about 8 months back, which is under control. But the issue that is bothering you is the weakness and pain in both hands in the morning hours. I think we need to understand the details of your smyptoms first.
We need to clearly understand your symptoms to be able to help you out.
When we say weakness with pain are you suggesting that you find it difiicult to hold a object, use your palm or is it that due to stiffness
and pain in the hands on waking you find it difficult to carry out any activity. Are your hands swollen then?
As you rightly carried out a rheumatology examination, we still need to know that the tests to know the tests that were done to reach to a diagnosis. At times in rheumatology , certain tests are negative despite classical features of the disease.
So I would suggest you to discuss your case with a rheumatologist
again with all your lab results and if possible a picture of your hand when it is painful for doctors to see if there are any obvious signs of disease.
Hope this helps.