Welcome to this site. You're right...you need to quit. Click on the Welcome Center Link above and read the Tom and Jenny Kern Story.
It will be hard...but not as hard as when Tom passed away with his daughter at his feet saying "daddy, don't go." Anxiety, sleeplessness, figity, headaches, etc...those probably don't suck as bad a chemotherapy, disfiguring jaw-removal surgery, feeding tubes I bet...and that is IF you live!
If you quit today, then TODAY would be Day 1. Why the fuck would you wait until tomorrow to save your own life? Join us today...for YOUR sake. You know what happens tomorrow? I don't don't either...better do it right now, huh?