My baby is 3 weeks old, for the past 2 days she doesn't sleep well during the day and night, she only wants to sleep on the lap and wake up when put down to bed.

A. That happens because initially when you feed the child goes to the sleep in the lap only and when you put them down they wake up so it’s a normal thing so after the feed put your child on shoulder and gently rub the back for 15 to 20 minutes of the child goes into deep sleep then put your child sideways on the bed and keep patting to let your child going into deep sleep