Wow, amazing the different opinions doctors give. I met with my ENT on Wed last week (scheduled TT for 12 June), and he said false positives from fine needle biopsy rate is 15%, yes one five percent. But, sine my TPO shows Hasimotos (mild, yet the numbers are higher than normal at 63), I'd eventually need to go onLevothyroxine anyway (even if it might be years from now). So, even if my pathology comes back neg for cancer, I'd need the T4 supplement anyway (eventually).
However, if your pathology report shows no cancer, at least you don't have to do the RAI, and get the side effects that are possible from that. So, really, actually, this might be a good thing? I know, it doesn't feel that way right now, and I really really wish you the best of luck.
You don't say that you are on Levothyroxine, if you are not and it is going to take "months" to get the results back, start screaming now. Take someone with you to the appointment who can explain how tired you are if you don't feel as if you'll have the energy to demand treatment. Maybe you are on Levothyroxine, and that's not the issue. But, I no some docs postpone starting it to increase TSH for the RAI (which you won't have I assume if the pathology come back neg).
Let us know how it turns out.