3 week old not sleeping well?

He grunts and groans all the time. I feel like there no peaceful sleep. And it keeps me up because I hear him groaning all the time. The doctor wasn’t concerned but I don’t think this is normal!

Occasionally he’ll take a fuss free map that’s 3 hrs long. But he’s up constantly at night time. And I’m about to lose my mind. I’m so tired. I have a 3 year old to watch too!