Feeling defeated

My 4.5 month old is breastfed. I work full time and pump at work. I have a good stash stored for when she is at daycare. Weekends seem like my breast never get "full". When I pump at work and they are pretty full I can get 5oz from one 3 on another. She is at a healthy weight the Dr says, but now I have quite my job to start a daycare. If she can eat 5oz and I'm only producing 3oz every 2 hours I feel like it's never going to work..