Hun, I know it's hard to be sleep deprived, but she's still so incredibly little. Babies have such teeny tiny tummies at this age and those MOTN feeds are very important to packing on the pounds in those early days. I'd look to try to wake her up as much as you can in order to get those calories in her -- maybe a diaper change when she wakes, or halfway through the bottle in order to get the whole feed in. She should stop pooping sooner rather than later during the night, all 3 of mine continued to need NFs for months, but didn't need diaper changes at the same time. Maybe you could hold her for a few minutes to see if she poops before you give the bottle, so the diaper change will wake her up? The goal is just to get it all done quickly and get back to bed. Also, as hard as it is, get yourself to bed as early as you can.