Anak ko ganyan din! When I switched from exclusive breastfeeding to formula, ang diarrhea-like poops came for a few days kasi ang sistema ng baby ay nag-aadapt pa lang sa bagong milk, normal lang yan, hindi ka mag-alala. Pero since 3 days pa lang siya sa formula, I'd say give it another week or two pa bago mag-conclude na kailangan palitan; minsan kailangan ng time ang baby's tummy to adjust, pero kung tuloy-tuloy ang loose stools or may blood/mucus, better check with your pedia na to rule out intolerance.