Welcome David.

This site and its wonderful members has helped me also. I had right tonsil cancer which presented with the same symptoms as yours. Now I am 4 years from end of treatment and doing well. It sounds like your dentist is doing a great job with the fluoride trays etc - it is so important to keep your teeth and mouth healthy.
Please keep us up to date on your journey - most of us have been through similar and can offer understanding.

Best wishes and love to you from Helen