Pumping at work

Amanda • 22. Married 💍. 3 year old son. Due with baby #2 July 5th 2016.
How many of you ladies pump at work and what does your pumping schedule look like? I'm starting a job Thursday and have to figure something out to owe my supply up and have enough for baby while he's at daycare. Also how much is your baby drinking at 2 months old? How often? I'm trying to figure out a rough estimate of how much to bring with us.