Week 11 of expressing, I still have nowhere near enough to feed my baby - I manage somewhere between a third and a half of what she takes in the day. Also she seems to vomit breast milk much more readily than formula, despite the kitchen being virtually turned into a lab.
I know this is because I don't express in the middle of the night, but I just found that too hard. My husband's work schedule has been hell since we had the baby, and I had to feed and pump in a different room, and I was exhausted and lonely and... well, these are excuses, but I would have been a wreck.
So my pumping schedule now:
9am, 12pm, 3pm, 6pm, 9pm, midnight
if I skip a day I get slightly hysterical. I give her formula feeds last thing at night and her early morning wake, usually between 5-6am. The rest is between 50 and 100 percent EBM, depending on how much I can produce and how hungry she is. I'm loaning a hospital pump, and will have to give it back when I come back to England, so this scheme ends at 4.5 months, although I'd like to carry on. I think getting home on the plane, living through my jetlag and the baby's jetlag and then finding a pump would be likely to kill of my milk supply.