How much do you pump? We had some weight loss with LO who is 2 weeks old and had to switch to add some supplement and start a feeding routine. Every two hours we feed, nurse + offer 2oz of breast milk or formula and the the next just offer the 2oz bottle and so forth.  He had a bad latch but a nipple shield has helped tremendously. I know adding a bottle to breastfed babies this early can compromise breastfeeding but he was also getting dehydrated. I'm just really curious when you pumped at this stage, again 2 weeks postpartum, how much were you getting?