Newborn napping ??

The past few days my 2.5 week old has been having deep/heavy sleeping naps from like 11:00-3 or longer even...

He'll fuss and nurse for a few minutes here and there throughout.

I cant seem to fully wake him to eat properly.

And- should i try to keep him awake so he sleeps more at night?

How long is/did your 2-3 week old sleep during the day?