So I was exclusively pumping and bottle feeding my little girl. We got into that habit while she was…

So I was exclusively pumping and bottle feeding my little girl. We got into that habit while she was in the NICU for a week so I didn't try to change it. But now I've decided to breast feed because pumping was just alot of work. When I was pumping I would pump between 2-4 ounces every time. Now baby girl will breast feed for about an hour (on both sides so 30 minutes a boob roughly) then fall asleep. But she will wake up an hour later wanting to drink an extra two ounces. I don't have enough of a supply to keep up that demand. Am I doing something wrong? Is she not getting enough at my boob? Now after she feeds I can only pump less than an ounce. I don't want to starve her...