I've been back to work for a month now and I am not pumping enough at work to feed my daughter for the next day and right now have no choice but to supplement w/formula which I really don't want to do. My DD is 3 months old and is drinking about 5-6 ounces per feeding. The first time I pump in the a.m. I get at least 4-5 ounces and sometimes 6 ounces. The next two times I'm lucky to get three ounces! Which basically means for her feedings the next day she is getting half breast milk and half formula. On the weekends I breastfeed exclusively, just more often. What could be the problem, I really hate to have to give her formula.