I echo Anne-Marie's statements. Stress is a funny thing, and it can really distort reality. The easiest way to contract any disease is to research it on the internet.

I have been there, done that, got the T Shirt. Yeah, I eventually did have cancer, and chances are it could have been discovered far earlier if my ENT had been on the ball and if I had insisted on a biopsy.

You have been told that things are fine, but your fear and research tell you that this is wrong. Don't let the fear paralyze you -- try to get in earlier, keep after them for results, etc. Turn your fear into action and you will be fine.