BRC - Make sure you have lots of good health insurance including dental insurance (and life insurance) because it sounds like you don't really want to quit the tobacco. While you're at it, make sure and line up a LOT of friends and relatives who can take care of you at home and when you need someone to drive you to the doctor. Also get yourself a good laptop so that you can communicate your needs after surgery since you won't be able to talk. Then there are radiation treatments and since it is difficult to throw up and drive at the same time, you'll have to get someone to drive you wherever you need to go. You'll have to bring a dishpan to throw up in unless you prefer hanging your head out the door. You'd better have a REALLY good job, too because even with the best health insurance, fighting cancer is very, very expensive. I have watched and loved and cared for my son, who is close to your age, surviving cancer surgery and radiation treatments and I cannot begin to describe the anxiety, the sleepless nights, the worry and the ache in my heart just to see how hard he was fighting the cancer beast. If you don't care about your own life, think about the that special person in your life who will be taking care of you because if you don't quit the tobacco, you have a much better chance of getting cancer. No matter what you have to do to quit the tobacco habit - it's nothing compared to what you will have to do to fight cancer.
It's your choice.