Re: almost diagnosed...some questions..
You need a full thyroid profile and look into adrenal function as well. You can be hyperT in one level hypoT in another and deficient in many minerals and vitamins.
You need a
TSH 3rd Gen range should be 0.3-3.0
It is possible to have both Graves and Hashimoto's. This is known as Hashitoxicosis by most and very hard to treat. It is the worst and best of both. My mother and Aunt B1 had both. The final fix was thyroid removal.. then medication.
Adrenal issues of note Cushings and or Addison's. You need the ACA antibody test and the ACTH and cortisol blood serum tests with a 24 cortisol rhythm test. This will cover your basis and should be revealing in any added tests you may need. A thyroid uptake scan should have been scheduled as well. If all this was done then your Endo is working for you.
If we learn by our mistakes, I am working on one hell of an education.