Is thyroid cancer passed on through genetics ??

I wasn’t sure how to word the question above but my sister F20 has recently had her thyroid removed due to papillary thyroid cancer.

She will be having radio-iodine soon.

I feel like this is a selfish question to ask, but is there a chance I might get it too?

I do have PCOS, which is also revolved around the endocrine system (we joke that our genetics did us dirty ) . And PCOS make me have a higher chance to get endocrine cancer, ovarian cancer and breast cancer.

I know breast cancer runs in our family and also people who have had thyroid cancer say they get breast cancer.

Me (a teen) can’t get to sleep some nights since I’m worrying so much about her and about the what ifs. Any tips on how to support her too ??