I'd agree with Carl - in the short term I ate enough chocolate and candy to keep Willy Wonka in business for quite some time. And it was completely unexpected as I never had a sweet tooth at all while I was drinking.
Long term obviously you have to eat a balanced diet, and do see your doctor if you start gaining too much weight too fast - but my guess is you are just making up for the lack of carbs/sugars you were getting in your drinks. Exercise never hurts either, even if it's just taking a walk around the block.