I wonder about food cravings. I get them sometimes and they are less of a craving for food and more of my mood suddenly being extremely unstable and an inabilit

I wonder about food cravings. I get them sometimes and they are less of a craving for food and more of my mood suddenly being extremely unstable and an inability to focus. This is something of a problem that I have had for several years I don't know if maybe I have something medically wrong with me. I am in excellent shape and work out regularly but I am very heavy (240 lbs) so it might be I just need a very large caloric intake and I don't eat enough at each meal.