Baby whinges all through night...

Kayley • 24 years old, I have a little boy who’s 4 and I’m TTC my second baby!! 👶🏻
My son is 4 weeks old and all through night he will whinge and moan while he sleeps, and it's constant. I sit thinking he is going to wake but he doesn't. Could he be doing this if he's in pain, he has colic, and i've been giving him gripe water so he shouldn't be in pain😞