Yup, needs better lighting for sure. It appears you had the flash off to the right, but there should have been a reflector, or perhaps another light in a softbox above her.
Just my opinion, but this outfit needs her to be awake and standing (with help of course). I think it would not spoil the picture to have mom's hands in the frame to hold her up. If you want to do the sleeping baby pose, have her wearing a cute sleeper, not a "warfare dress".