Even in the unlikely event that you would have cancer, thyroid cancer is the easiest of all to cure, by removing the
thyroid and taking the
cancer with it. This would leave you with hypothyroidism
and you would be dependent on thyroid replacement hormones, as are many of us, here on the forum, including myself.
You should ask your doctor for some simple thyroid blood work. The basic thyroid panel is TSH, Free T3 and Free T4 (be sure to specify the "Free").