I v noticed my Lo sleeps a lot this week since he turned his 13 weeks. He's been able to sleep 10 hrs through the night since week 7, now it extended to 12 hrs!! during the day time he only wakes up, feed and play for max one hour. then go back to sleep for another one or two hours. I counted today he s been sleeping for 16 hrs plus since last night and it's only 6 o'clock in the arvo! When I tried to play with him, he's been cranky, showing no interest, and kept rubbing his eyes n yawn... Is it normal?,? Why he's so tired?!