S.C.
Congrats on your baby girl!
One way I used to keep my girls awake was take their socks off. My daughters hated their feet messed with :) It did the job. I also used to make sure at night we kept the house quite around 8pm dim the lights and so on and during the day we would have curtains open so light gets in. That way they would get an idea of night and day. It's very hard and frustrating getting no sleep. Just keep trying. In time she will learn her nights from days! Good luck and I hope that helps some!
~S.