K.C.
Great job!!! Breasts work on supply and demand. The more frequently you nurse / pump, the more you make (but note I said frequency, NOT duration)! That's not myth, that is fact.
Does your daughter nurse one breast at a feeding? If so, I would pump one side, while she nurses the other. This should increase your milk much faster than pumping after she nurses. I wouldn't "top her off with a bottle." I would just keep flipping her back and forth on the breasts.
You never actually run out of milk (that is a myth) - it is continually being produced. The difference is, the "stored" amount in your breasts is gone, so the flow slows down. She IS getting milk, but would like it faster and so you top her off (don't do that). This is also why you are getting so little when you pump AFTER she nurses and why I strongly suggest tandem pumping-nursing instead. You want to frequently empty your "storage capacity" of your breasts and they will start to "refill" faster.
By the way - NEVER, EVER look to a pump to see what you make. Your daughter probably takes in 3 to 4 oz A FEEDING at the breast. Pumps are rarely a good indicator of what you make - they are simply not as effective as your child.
I could only pump while my son nursed the other side and he needed to "start me off" on the side I was going to pump (I let him nurse there for about 30 seconds, then flipped him to the other side and pumped the one he started).
Also, make sure you have a very good pump - hospital grade ones are the best and can be rented. Often insurance companies will pay for the rental! Make certain the flanges fit your nipples correctly too (there are many sizes).
If you need ANYTHING I counsel breastfeeding moms across the country.
Peace-Love-Boobies!