I do not think a nuclear scan is likely going to be helpful. Also the nodules are small, measuring up to only 1.0 cm. I would likely see an endocrinologist first to see if any additional testing, at this point, of the nodules is needed. If you have not had testing for Hashimoto's, TSH, free T4 and TPO antibodies, would consider this as well as these changes may be related to Hashimoto's.
Hi....
I'm in Australia so don't know what a HMO is??
You won't know exactly for sure until you have further tests and scans. There are a lot of people on here with great advice that can help but you need to try see an Endo ASAP.