Beth, its a no brainer that your chances are Nil while you keep putting that sh*t in your boday. I would have been dead decades ago if I worried what others and stats says. Look at the examples here at SR and those you have met elswhere, clean Addicts are your power of example, should you choose to see that.
As for willpower, I had none left when I quit, I was beaten, others and my Higher Power did it for me, all I had to do was not pick up and front up to meetings.
Kevin