Hi for the past 5 weeks I have been very shaky, poor sleep, exercise intolerance, hot, night sweats. No menstral cycle x 8 months. Not pregnant. I had my TSH tested was undectable, had free T3 and T4 tested: 2.2 and 235. My endo told me it was either thyroiditis or graves disease. Wants me to wait a couple more weeks before getting the thyroid scan. My question is: is it ok to wait? how does she know it is not cancer or something like that? are my numbers really high or just mild? if it is thyroiditis when will it go away, I am very ready to exercise again. In your expert opinion would I be able to run a marathon in May, I am currently a runner. When can I start expect to start feeling normal again? I am 26 years old 5'5'' 115lbs. female. Thank you for any information you may have.