Dino,
You could just have the tonsils taken out - NOT because I think you have cancer, because I don't - but because they could be causing some of your problems. You have been counseled repeatedly to let this go and you obviously aren't going to do that, so just have the tonsillectomy and be done with it. Make sure to tell the doctor that while he's in there, you want him to look at everything, not just the tonsils, scope everything possible, biopsy anything even slightly suspicious, then, if nothing is found, let it go and get on with your life!
Rosie