Me + Math = Stress + Compulsive Eating?

Ok well, the "question" says it all. I used to fall into that cycle, then I broke the habit, but I'm back once more. I'm not one for junk food but I find it comforts me and I always have to be eating while I'm doing math. It's so bad! I'm trying to always keep fresh fruit and vegetables close by so at least I'll be munching on something healthy. Ugh! How can I break this habit .. again? (I broke it last time only because I put on like 3lbs over one test and I really don't want that to happen again). Thanks!