I know there isn't an exact amount of time but is it fairly unlikely that I could have oral cancer at 23 after just 6 years of chewing? I know, I will get checked and everything but am I most likely ok?

What symptoms are you having that makes you think you have oral cancer? BTW Im a former 12 year dipper and im only 30. I had lots of times when i thought i had was getting or had oral cancer and it always turned out to be some sort of dental problem.