What's the longest stretch your newborn will sleep? What time does it happen? When is the roughest part of your evening?

LO2 is 3.5 weeks old and we are finding that we can't get him to sleep on his own between 10:30pm and 1am...last night I don't think he went to sleep until 2am! I must have nursed him every 45 minutes. His longest stretch is usually 3 hours, from around 5:30am.

I feel like my supply takes a dip in the evening, which is why he wants to keep nursing. Anyone doing any bottle top ups after nursing?

I forgot how tiring the newborn stage was!