I unfortunately had problems breastfeeding my DD after one week. I had issues and was using nipple shields but all of a sudden she just didn't want to feed. My DH and I decided to exclusively pump and bottle feed her and take it from there. At first I was pumping out about 2 ounces. Eventually my breasts could not keep up with my DD demand and so we needed to substitute her demand with formula. My supply has now gone down even further to about 1 and half ounces if I'm lucky. I pump every 3 hours and try and sit on there for as long as I can. I have found that even if I sit on the pump for an hour there is nothing coming out. So my question is, is it a case that I need to be on the pump every hour? Should I be trying to pump longer? I was using the Phillips Avant electronic pump and we have now rented out a machine from the pharmacy which is a lot stronger and obviously it takes a lot quicker too. Any help or suggestions would be a great help.