You do not need to worry. It is much less dangerous than the other cancers. I know someone who had 甲状腺癌 40 years ago. She had it cut and is still living very well. And she is very healthy now.
Do not worry too much. Most likely the doctor will remove your thyroid glad partially or totally depending on the biopsy result. And you have to take thyroid hormone if it is totally removed. The progress of thyroid gland cancer or carcinoma is good. And now a day, there are many options to treat the thyroid tumor. Bless you, and good luck