2w old won't wake to feed


Hi ladies!

So my 2w old won't wake to feed. My pediatrician said to not have him go longer than 4 hours to eat and for the first time since we brought him home, he did not wake up before that.

He is back above birth weight, so I know he's eating plenty, lots of pee and poopy diapers. At this point, 3:30am and a sleeping baby, is it terrible to let him sleep?

I've tried stripping him down, skin to skin, tickling feet and armpits, lights on etc etc.

Any ideas? Thanks in advance!