Robbie,

I agree with much of the advice you've gotten above -- nothing that you mention would suggest cancer, and the pain could well be associated with extensive gum disease that has been left untreated for awhile. However, if a doctor tells you it isn't cancer simply because you are experiencing pain, he doesn't know what he's talking about. Oral cancer can be painless, but it can also be painful (as mine was -- 24 hours a day). I'd recommend that you see an ENT who is accustomed to doing thorough head/neck examinations if the pain doesn't subside with the treatment you're getting.

You mentioned rinsing with mouthwash -- are you using one that contains alcohol? If so, it may be adding more irritation to an already-sensitive area. There are good non-alcoholic mouthwashes (such as Biotene) if you need to find a substitute.

Cathy