Almost 4 weeks ago I had a complete thyroidectomy , every biopsy before that had come back benign , but the 4 nodules were massive in size the largest at 6cm. I am not post opp almost 4 weeks and they found a tiny spot of cancer , clear edges , papillary . Well I am awaiting a full body scan to start the thyroid meds , and they want my TSH to be over 30 ... well once a week blood draws have shown them rising and they got to 26 last Monday and I repeated the test on Friday and they called me this morning to tell me they had dropped to 18 !!! How can this be ??? I just want to get this scan over with and on the thyroid meds .... why would my levels drop ?