Re: Not pumping enough...
You're doing great mama! I think it's a great idea to try the pacifier after, but it is also possible that she wants to drink 4 ounces at a time. I might try to scale it back a little bit, say to 3.5 ounces per bottle, just because 20 ounces is a lot to have to pump every day.
But, you did say she is sleeping through the night. You might be able to pump less if you can try to get one or two more nursings in there. She'll need about 24 ounces a day, and right now it sounds like she's getting most of it at daycare.
I hope you like your new pump! I'm so glad you're going to get one.
Lilah 10/08 nursed 25 months
Beatrix 01/11 nursed 30 months