I get severely depressed, headaches, unmotivated, lethargic and hungry if I don't eat every 3 hours. Your thoughts at least for me, do change when your body doesn't feel 100% You feel less capable, less motivated, lose cognition. So yes to all please force yourself to eat if you have to. Every 3 hours have a light picking of something of substance and healthy. Your brain stomach muscles, and mood will thank you for it.
