Repost on cancer coming back?

I am now 23 I was diagnosed at 16 with thyroid cancer not sure what kind I had the entire thyroid removed the first time followed by RAI 3 months later it came back I had a 2 nd surgery done to remove lymphnods around thyroid area and they scraped my muscle tissue. Since then almost evey 6 months it has come back I'm due for my next 6 month check up on may 5 th its been almost a year since my last reoccurance. I really can't do another radiation treatment I don't like the throwing up for 3 days