My LO all of a sudden is sleeping more than usual. She wakes up from a nat, eats, plays/tummy time/ and then starts to fall asleep again. She is 6 weeks old and had never slept this much during the day. How much should she be awake during the day. This is very unlike her. All of this started when we switched formula three days ago. Also, she is sleeping up to 6 hours spans at night. Should I be waking her up before that to eat?