Uy, first time mom anxiety talaga yan, but it's totally normal na mag-adjust ang poop ng baby when you switch formulas! A few of us tried changing brands din and nakita namin na kailangan ng 1-2 weeks para mag-settle ang digestive system nila, so don't panic agad, basta wala siyang fever, vomiting, or constipation, okay lang usually. That said, since worried ka na, best talaga to check with your pediatrician para sure, lalo na kung parang off yung behavior niya or di sya kumakain well, para peace of mind mo na talaga.