The next day i pumped 8 oz**
There's a product called "motherlove more milk plus" they make liquid and pills it boost your milk supply and for moms that pump it really works and helps! you might even build enough milk supply that you wouldn't have to give formula! Breastmilk has so many important nutrients in it for your babys immune system. I was pumping 3-4 oz then stopped pumping for a while but when i started pumping again i would only get 1-2 oz i took the motherlove and the best day pulled 8 oz!
I would only give formula if you do not pump enough. Otherwise if you are away from your baby for an extended period of time then your milk may decrease since breastfeeding turns into an suppy by demand. Most states have laws saying that a working mom is to be given the time needed for pumping throught the work day. I couldn't pump enough with my first and had to supplement with formula