My daughter will be 3 weeks on Friday and she has not been sleeping during the day that well. Anyone…

My daughter will be 3 weeks on Friday and she has not been sleeping during the day that well. Anyone have some advice about how I can get her to sleep more during day she used to sleep for an hour and a half sometimes 2 hours but she won't even sleep for 30 minutes at all today I hope she sleeps tonight though I feel like there may be something wrong with her :(