LO day time catnap

Anybody have issues with newborn couldn't sleep in the day? Recently my 6 weeks LO have trouble sleeping in the day. Usually I'll put her to sleep in my arms and then put her down when she’s deep asleep. But then now once I put her down, she'll open her eyes then cry after awhile . As soon as i carry her up,she'll fall asleep soundly. So she will have short catnaps in the day and cry murder once awake cause she is sleepy. Is this just a phase or should I be concerned??