Confused baby

Rachel • 24, Hull UK 🇬🇧 Expecting baby number 1, 👶👑 my little princess due 29th February
My 5 week old seems to have her days and night mixed up and it's really taking its toll on me as I'm getting maybe 2-3 hours sleep a night and I ha e so much to do during the day I can't nap. How can I fix this? Ive tried to keep her awake longer in the day but she gets very crabby and cries a lot and I end up crying with her