My baby is only 4 days old and the ped has recommended we supplement with pumped breast milk/formula to get her weight back up. Doctor recommended we give her 1 ounce extra at every feeding. She’s lost around 1lb since birth. I have pretty flat nipples so she wasn’t latching well at the beginning and now I have to use a nipple shield. Does anyone have any tips? She’s been so fussy and I already feel like it’s confusing for her to go between a bottle and breast at so young. I hadn’t planned on giving her a bottle until right before I went back to work at like 3 months.