My 14 day old baby doesn't wake up during the night for his feed. sometimes 5 hours will pass and still asleep. what should i do?

Enjoy the rest: Some babies can and do get by without night feeds. If he makes up for it during the day & is growing /filling out, leave him alone. I don't wake to feed in healthy babies unless it has been more than 8 hours.

Mgt: As long as he is growing well, this pattern should be fine. I would suggest having a regular pattern of sleep and feedings.