Asking for a friend: Usually a calm, happy, enthusiastic person. But when they get hungry, they get extremely angry and irritated. They begin to get irrational thoughts and self-describe as "my life feels like shit" and feel hopeless. They describe these incidents as traumatic. They don't want to be around people or do anything. This happens when even mildly not eating enough- like after 2-3 hours after a meal. What could this be?