I agree you should have the uptake scan (nuclear), it is one of the diagnostic tools, I also think you should fine a different doctor if at all possible, even though this is the "best cancer to have" it is still cancer.
My doc found my nodule in a routine physical, I felt nothing, had zero symtoms, he ordered a sonogram and uptake scan immediately, had to wait 30 days for the uptake scan, becaues I had to be off my thyroid meds for 30 days prior to the scan, had the somogram twa days after doc felt the nodule. The ENT my doc recommmended decided to treat very aggressively, no FNA, straght to surgery because of the size and location of my nodule , it was also a "cold" one. They did a partial thyroidectomy, 1/24/08 lo and behold, foru days later my pathology came back bad, had the second surgery 2/7/08. Had the RAI on 4/7/08, and the WBS on 4/22/08, a clean scan. I am being restaged right now, have my finger crossed. I had follicular carcinoma, stage II. This kind can spread to the lungs, bones and brain, but it is very unlikely.
All of my doctors have been extremely optimistic,they do take it weriously, but do not want me to be overly worried, they constantly reassure me. They are all wonderful, caring, and I totally trust them, this has been very important aspect of geting through this. All of them have been recommended by my primary care, and internal medicine specialist.
If you are in North Texas, I would be happy to recommend a good doctor.