For the past 3 evenings around this time, DS starts fussing and wants to eat every 2 hours. That's 4-5oz of formula every 2 hours!! The pacifier does NOT help. He takes it long enough to realize there's no food coming out. Last night, he ate off and on for 4 hours!! He just gets so fussy at this time every evening. He is going to be huge if he keeps eating 4oz every 2 hours! What's going on??