Did you have labs drawn for your thyroid TSH, FT3, FT4?? I had a 3.4 cm nodule which was over-producing hormone and making me progressively more hyper-active. I could have had half the thyroid out or RAI - I was going to have the operation, but eventually chose to do the RAI instead. All going well, both should leave you with some thyroid function with a possibility of supplementary meds (or sometimes with RAI possible full supplement depending on the uptake).
I'm not sure about the other nodules. My large one came back benign (although there's a window of error), but was discovered to be 'hot', which was suspected after the labs were drawn. 'hot' nodules are less likely to be cancerous (window of error there too). My specialist recommended RAI, but another specialist recommended operation - there seem to be two schools of thought. I'm not sure what bearing, if any, the parotid tumour may have on your case though....
Not to scare you but I went through a TT this year and had stage 1 Papillary cancer on both sides of the thyroid. Only one side tested but after TT it tested positive on other side. I had 4 nodules. They do not get smaller.
Maybe find a surgeon to do a consult. Find a good one! Surgery was not a problem and I have a very small scar. It is a hassle getting hormone leveled out.
Best wishes