You don't have cancer, LW. Stop reading up about it on Google or whatever. You have a much better chance of winning the lottery.
Dentists nowadays have a UV device they can shine in your mouth to quickly find suspect lesions. And do a biopsy if necessary.
You just have a very active brain & you're needing distraction. Go out for a bike ride or something.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh