So I thought that tiny babies didn't know the difference between day and night, but my 4 week old baby seems to be totally nocturnal. She naps well in the day - comes off from a good breast feed sleepy then snoozes in her downstairs crib for 2-3 hours, sound as you like.
Then, soon as it gets to about 9pm her eyes fly open, she starts to grizzle, feeds badly, head butting me and flinging herself about on my nipple, wont settle in the snuzpod and that's the story then until about 5am when she then seems to calm down and be ready for sleep again. I get my best sleeps with her between the hours of 6 and about 8 am.
What is this? I know she's very tiny and have read about the 4th trimester but she's been regular as clockwork with this for over a week now and I am so tired. 
Any thoughts so gratefully received!