Aww first time mom, totally understand the worry! What color exactly ang nakita mo, is it greenish, yellowish, or parang dark/tarry? Kasi ang kulay ng poop nila changes depending kung breastfed, formula-fed, or may solid foods na sila, so it's usually normal, pero better pa rin i-check with your pedia to be safe especially if may other symptoms like fever or lethargy. A few of us moms here had the same question dati at nag-panic kami, pero yun pala normal lang because of what baby ate or drank!