I am making plenty of milk for my baby, but when I pump it just won't flow. I've tried everything. I'm feeling the letdown, but then no milk is flowing. When I do have success its usually when I wait a little longer than normal and am over full but even then it takes forever and flows very slowly. My baby is fully satisfied on weekends when feeding with me but I can't keep up my supply for the week while I'm working.
From what you describe it sounds as if your pump flanges may not be fitting you properly, which can restrict the flow of breastmilk when pumping. When your nipples are drawn into the tunnel part of the flange, there should be open airspace around your entire nipple. Your nipples should be able to move in and out of the flange freely with each cycle of the pump. They shouldn't touch or rub along the sides of the tunnel. If they are touching or rubbing at all this would indicate that you would need larger size flanges.
All the best,