Re: Thyroid Problem - Follicular Lesion.
I think your doctor is trying to help you with those suggestions. In the US a nodule like that would be recommended to be removed. Your doctor is suggesting you try thyroid medicine (and vitamin d although I'm not sure that's thyroid related or not), and then get another ultrasound in 6 months. If the nodule grows by then, the doctor recommends surgery.
Sounds like a plan to try if you are afraid of surgery.
BTW, I did have thyroid cancer many years ago, and it wasn't a bad surgery, it's not like other cancers, more easily treatable and curable.