Looking for some eating/sleeping advice

Vieve831

Last night was LO's best night of sleep ever! My Mom babysat for us while DH and I went to a fundraiser. He fell asleep at her house about 9:30pm (normal), we picked him up at 10pm and his was in bed by 10:30 (he slept through the whole transfer which was shocking to us). He then slept until 4:30am. Normally he is up 2x/night, sometimes more. Often his first wake-up is around midnight. 

Yesterday was the first day he had bottles of pumped BM all day. He had 24oz total (plus one nursing session before daycare). He normally has 15oz at daycare and then nurses at home the rest of the night. I pumped 4x yesterday and got 26oz, but I was really surprised by my last pumping session because I got under 3oz.

So now I'm wondering if LO is not getting enough in the evening and this is why he wakes up so much throughout the night. But the thought of pumping anymore than I already do is not appealing at all. 

Do you think last night was a fluke or related to his BM intake?