I would ignore the advice of the GP who is not very qualified to guide you in the decision making process. Many of us had had bad experiences, missed or delayed diagnosis from trusting a gp. Some of them couldn't Dx a throat cancer if it jumped out and smacked 'em. My tumor was so large I could see it myself and my gp couldn't figure out what it was.

You may only get one shot at this - take your best shot. Find the most qualified oncologist, radiation oncologist and head & neck surgeon you can, preferably in a multidisciplanary setting where your treatment is coordinated. Maybe you can get state of the art treatment in Barbados but you need to research this very carefully and quickly.

I drove 60 miles each day for radiation from a top comprehensive cancer center. Many have traveled even farther.