Years ago when I gave up smoking I realized taht aside form the nicotine there was a comfort/oral thing going on that would make it very hard to quit. I got tons of sugarless mint gum, and every time I had a cigarette craving I would chew on gum. Sometimes it took two pieces. By the time the gum was all chewed out my jaw was sore and my mouth was super minty and I was distracted from my craving for a while. You might want to keep some mints or gum handy for a while until you get the upper hand on the chocolate/sugar binging.