mixed breastfeeding

2 weeks old baby girl, 2 days na kmi nag mixed breastfeeding Kasi sobrang hina ng supply ko kinukulang cia to the point na walang Tulugan nakababad na cia boobs ko, so we decided na mag mixed Muna, problem ko po kasi Hindi pa nag popoop si baby , normal po ba 'to? 3rd day na cia mixed then 2 days na cia Hindi nagpopoop,