I know this is many years since you've posted this, but I have the exact same thing. Ever since I was little, when the ragweed was out etc. I'd get a really bad allergy attack and then just have to eat! I asked a doctor friend and she couldn't guess why. Now I live in Japan and when the cedar pollen flies I have terrible trouble. Never fails, I'm eating anything I can get ahold of; as many different flavors as possible too. I'd love to know why this happens.