Aw, normal lang yan for mixfed babies, especially at 3 weeks, they poop a lot talaga! But yung pag-struggle at pag-cry mo sinasabi, I'd gently suggest checking with your pediatrician kasi baka may discomfort siya or constipation, lalo na if it's happening frequently. A few of us moms noticed na sometimes ang formula ay iba ang digestion compared sa breastmilk, so your doc can advise if kailangan adjust ng feeding or formula type. Hang in there, mama, first baby jitters are real, but you're doing great observing her closely like this!