Ay, normal lang yan sa some babies lalo na once they're past the newborn stage, a few of us moms noticed our 3-month-olds would go 2-3 days without pooping kahit healthy pa rin, especially if exclusively breastfed! But since you're worried, better check with your pedia just to be safe, kasi they can tell if baby's constipated or if it's just their pattern na, mas makakatulog ka ng mahimbing pag alam mo from the expert, trust me haha.