Not producing enough....

Jessie • Married to the best! Sorry y`all missed out

My baby is still rooting and hungry after i nurse for 15 min + on each side so i feed her about an oz of formula. I was curious to see of i was even producing an breastmilk so i pumped and got about an oz all together.

my question is....am i doing something wrong? am i ok to do the breast milk with formula?