Well come to HCM
I really appreciate your concern, the important is the clinical symptoms and the health condition if you are doing well and do not have any symptoms, even if it is the silent features detected then also it is being cleared with the test done and that is all are unremarkable.
If the thyroid profile or hormone studies are normal one then it may not be the thyroid disease
, still just to clear the doubt I would suggest to get done the Iodine
up take studies or imaging studies of thyroid gland, or even can discus this with endocrinologist
hope this information helps.