Is he really still asleep? Baby sleep question

Joy

My son is 6 weeks old. He is exclusively breastfed. He normally sleeps between 2 and 3 hours at a time.

He has been asleep since 8:30pm, it is now 1:20am. I am beyond happy but kind of worried.. this has never happened.

I feed on demand and trying to get him to sleep more at night. Should I wake him or let him sleep his feel? I woke up leaking and currently pumping one boob.

BTW...I used Mommy's Bliss nighttime Gripe water for the 1st time. Could that be why? He was super fussy yesterday and cried a lot. I have checked on him and he breathing fine.

Let him sleep?