My 5 week old normally sleeps for 2 maximum 3 hours every now and again at a time at night but just slept for 5 hours and went 5 and a half without a feed. He only woke up because we woke him up. Even then, he was drowsy all throughout the feed and fell asleep straight after. Am I worrying about nothing? Is it normal to start to sleep longer? Also, should we wake him to feed or not? Thank you.