Help First time breastfeeding/pumping

I’m pumping every 3 hours and only producing just enough for my newborn (6 days old) to eat (2oz total from both boobs every session) . Is this normal?? It makes me nervous because I don’t really want to supplement with formula. What can I do to help with my supply? I drink tons of water and eat oatmeal every morning. (And my newborn won’t latch I try before every feeding)