What could be going on?

Breanne • Baby girl due March 24th, 2016! 💕
My baby is 4 weeks old. In the past two weeks I've taken her to the lactation consultant and she has only gotten .8 oz from one boob and nothing from the opposite side. I did have issues from the one side so I expected that, but only .8 oz from my good side?! :( I've been pumping to boost supply and supplementing with formula. I'm starting to get really discouraged. I am able to get about 2 oz from my good side and almost .5 an ounce from my bad side. She's eating 2 oz from me and 2 oz of formula each feeding. She is still hungry after? Why is she constantly wanting to eat? (have been bottle feeding only)