I suggest you document your symptoms, ie. heart rate, blood pressure, heat intolerance, increased appetite, the way you "feel" in general, and report them to your doctor. Read your post again, and it seems that your endo is on board, has reduced the dose, and you need to wait some more.
But it sounds like your doc is doing the right thing, and perhaps it is a good thing to remember that all things Graves’ move very slowly. Perhaps during the next two weeks the hyper symptoms may begin to recede. You will learn nothing from the next lab that is useful, unless you wait at least 6-8 weeks. If it is done before that, it will not represent where your really are.
The waiting is hard.
Shirley