Not pumping enough

Felicia

How do I increase my milk supply when I pump? I pump every 2-3 hours. I try heat packs prior to pumping. I drink at minimum 70 oz of water through the day. I drink milk and juice.

I eat a bowl of oatmeal every morning. I eat lunch and dinner. I can pump from 30-60 minutes and only get about 1 -1 and a half ounces each time.