how long do you pump each time?
initially, i pumped 15 minutes. then i pumped 20. then up to 25, then i pump 30 mins, and i keep increasing until 40 mins. i always keep time when i pump initially. so that i know how long and roughly estimate when to increase the duration.
if i remember correctly, when i started pumping at around week 4, my milk flow is slow. that's why need to take so long. plus i add additional 5 minutes of extra pumping after almost all the milk is out so as to stimulate further. after i think week 6-8, the milk flow faster, so i am able to reduce my pumping time to about 15-20mins.