my baby sleep pattern has been changed past one month at night he sleeps by 3.30am or 4am..gets up by 11am in between he wakes up alot he is not cranky nor crying nor irritated but he just wants to play. i tried many options but all in vain , from beginning, his sound sleep time is half an hr rest he sleeps if im beside him but that too only for an hr or 2..his daily routine has been disturbed alot because of this sleep pattern and please suggest how to keep baby awake if he feels sleepy in the evening time bcoz my baby sleeps by 9-9.30pm and wakes up by 10-10.30pm he doesnt sleep continue till morning he jus wakes up and start playing and bcoz of this my baby sleeps pattern he sleeps by 3.30-4am