Ay welcome sa mommy life, mama! At 3 weeks, normal poop varies depende kung breastfed or formula, breastfed babies usually have yellowish, seedy poops na parang mustard, pwedeng ganitong 8-10 times a day or kahit once every few days pa lang, lahat normal pa rin; formula babies usually may mas firm at darker poops, around 1-4 times daily. A few of us moms, lagi kaming worried sa color at frequency nun, pero honestly the best indicator is kung baby's gaining weight, active, at hindi signs ng constipation or diarrhea, kung may concerns ka talaga, check with your pedia para peace of mind mo! Ingat sa inyo!