I am so sorry you are faced with this. It is best if you seek counseling that supports women in abusive relationships. You need to be emotionally and physically safe to go through this treatment.

The treatment for thyroid cancer varies. The two most typical are: radioactive iodine ( need support for a few weeks ) and second, radiation and chemotherapy (often 7 weeks ).
Radiation and chemotherapy is usually for cancer that has progressed outside the thyroid and it is done after surgery.
You have a process ahead of you that you must be emotionally strong for. I hope you live in an area with a cancer center and a good head/neck medical team. Having trust in your medical team is very important as you go through this process. Peace.