My daughter is 2 1/2 months and really likes her sleep. We wake up anywhere between 5am and 6am. She is very active in the morning when we read and play together. She will nap for about 5 hours during the day split into 2 or 3 naps in the baby carrier. She was really sleepy at 4:30 today. She started to stir at 5:15 so I got her up but after 10 mins she couldn't keep her eyes open and was "grizzly crying". She has been asleep since. If I let her she would sleep through til 10 or 11pm for a feed and then straight back to sleep. It's like she thinks it's night time in the afternoon. She is a healthy weight, very alert and curious when she is awake. Should I be letting her go to sleep this early?