Katie,
Sometimes there really IS no reason. I never smoked in my life, was a light drinker, and was negative for
HPV. I was also very healthy. When I was hospitalized for my surgery they asked me when was the last time I had been hospitalized. I said, "Well, my son is 30 years old..." So, cancer was the first time I had been sick other than routine colds and flu. I go through the same thoughts myself, even now that I am three years out of treatment. My ENT said that it could possibly be some sort of virus, probably one that hadn't even been discovered yet.