Hello – Definitely check out the links that Ellen posted on this thread, especially the video on the Emotional Aspects of Graves’.
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http://gdatf.org/forum/topic/44322/?page=1
In addition to emotional swings, difficulty concentrating is also a classic symptom of thyroid dysfunction. You should start to see some relief as levels stabilize.
In terms of the muscle aches, I would definitely report that to your doctor. That can happen with hypo or it can be a side effect of antithyroid medications. (I can’t recall if you are on replacement hormone or if you are still on antithyroid meds while waiting for the RAI to work).
Hope that you can find some relief soon.