How often do you pump?

My baby is only 6 days old, when I was in the hospital the nurse told me to pump after each feeding. But now she wants to eat every 1 1/2-2hours so by the time she's done and I pump, shes almost ready to nurse again and its like a never ending cycle. Is this normal?

Also I always get more out of my left side, like double the amount, even if she just nursed on that one. Is that also normal? I'm getting about 5-6oz per pumping session.

I'd like to be able to start a mini stock pile so my husband can also feed her. Thanks for any advice!