Hello all!

This is my first post here. I have a deep fear that I may have oral cancer. I have a sore I think on the ruff of my mouth. I recently went to a dentist and had full x-rays. I am scheduled to go this Friday again. My question is, if I did have oral cancer, would this have shown up on my x-rays? I have never had a pain quite like this, more of a discomfort. I cannot imagine what it may be from. I have went years without cleanings but never had a problem like this. Can someone tell me how to best investigate this, what kind of questions I should be asking?

Many thanks for all your help and advise.