Kristen,
I know it is a little bit of a late reply. But have you had a blood glucose test? Excessive hunger can be a symptom of both hyper & hypoglycemia. I had the exact same thing for a few years before cfrd dx. And it would happen, most often, at work, a few hours (about 3) after breakfast. The blood glucose can go way up after breakfast (especially if it is high carb breakfast) and then plummet some hours later. Anyway I'm not sure if you have come to any conclusions with this, but I read your post this morning and remembered my own experiences. It was especially difficult dealing with it at work.