Ftm sleeping question?

So I posted this in another group and didn't get much help. Basically, my daughter is just shy of a month old and (I'm not sure if this is normal or possible) I think she has her nights and days mixed up. I'm not very sure how to regulate her sleeping patterns. She sleeps in 2-3 hour intervals starting at around 7 a.m. and will wake up to nurse then sleep again. Then after that she'll stay awake for about 3 hours. So by this time it's around 4 pm and from then on she may take a nap for maybe 30 minutes to an hour and wake herself up by stretching or something and she'll do that ALL throughout the night. She doesn't act fussy so it just makes me believe she's got her nights and days mixed up... do newborns do that?