I am 5 days post partum. Today I tried pumping twice to get some milk stored up for the evening, when my newborn cluster feeds. I wasn't hoping for much, maybe an oz or so, but all I have so far is 1/4 oz!!!! What gives? I used this pump all through bf-ing my ODS (Medela pump n style) and didn't have any issues with pumping then. Am I just expecting too much? I'm pretty sure my milk came in two days ago.