Hello, and welcome to the Mayo Connect community. We are people living with a wide variety of diseases and conditions, who try to help one another along the way. We each strive to be informed medical consumers, and our own best advocates in our care. We are not medical professionals, so not able to provide medical advice. We can tell you what has worked for us (or not) and provide you with information and conversation about your question.

It sounds like you have been dealing with this for a long time, but the good news is that it is, like most thyroid nodules, benign. Here is some information about thyroid nodules and their causes :
https://www.mayoclinic.org/diseases-conditions/thyroid-nodules/symptoms-causes/syc-20355262
I have thyroid nodules that are monitored annually - for 11 years now. At one point my TSH levels were off-the-charts high, at other times they have been normal or low - it's annoying never to know where they are at. The high levels were the only ones we chose to treat, but every body is different.

As to whether treatment is indicated, that is a question for your endocrinologist. It will be interesting to know what you and your endo decide next week, will you llet us know?
Sue