Only takes 2-4 days to get over the physiological addiction. For that you can handcuff yourself to a bed if you absolutely have to (willpower is overrated). After that it's psychological. Finding a substitute for the hand/oral fixation is highly important. Gum or toothpicks were good suggestions. You might get some worry stones to keep in your pockets when you feel like you need something in your hand. They need to be things that will keep you occupied and will always be handy.
Good luck with quitting (even though I don't like you).