The trouble with pumping is that your body has to get used to it. I pumped full time with my first: he was in daycare, doing four 6-8 oz bottles in 7 hours (I know--yikes!) from 3 months to a year. I started pumping from day 1 and NEVER TOOK A BREAK. I pumped in the morning, 7 days a week, all year. Even during Christmas, when I was on break (I was a teacher). The key, for me, was consistency. I got used to pumping first thing in the morning, after nursing my son, and I had HUGE breasts when I woke up!! I even pumped in the mornings on weekends, since I had milk. BUT...when babies are little, they don't need much milk...and there are a number of points where baby's consumption does not seem to match output. I had some VERY stressful times with #1, pumping, because he was growing and, while a nursing baby seems to signal "make more", a pump does not. So...keeping up with the demands of a growing baby is very hard. I would guess that you are needing your milk supply to go from "tiny newborn" to "baby", and it's just a struggle. If you can, nurse your baby more...as much as you can! Be close as much as you can. Maybe add a pumping session for a week, and see if that gets your milk back up to where it's supposed to be. I also noticed that when I was pumping, illness REALLY impacted my milk. I'm now nursing #2, and I can't pump for anything--because I'm not on a schedule. I think if I did it regularly, my body would get used to expressing milk to a machine. That, and with #2, because I'm nursing and not pumping, I do not lose my milk when I'm sick--a cold would set me back a week, pumping; nursing, I had food poisoning and was dehydrated, but STILL had plenty of milk for my baby. Anyway--I found, pumping, that there were definitely frustrating times, when I didn't think I'd have enough, but if you really want to keep pumping, just keep doing it, and your body will adjust. Also--I had a friend who pumped every 2 hours, around the clock, and I think it wore her body out more than it helped the baby (she couldn't nurse, so she pumped)--so if you're pumping too much, and not sleeping, I think that can negatively affect your body, too. Good luck!