Mouth cancer?

I know I don't have it but I'm just curious. I quit chewin last year just cuz it got old and I never chewed much just when i played vids or poker but I was a cigarette smoker for 4 years and a dipper but not a dipper for almost 5 years Im only 25 would there still be a chance I could get mouth cancer? I have good oral hygiene too and when I get canker sores they only last probably a day or 2.