Last night, Nolan was up almost every 2 hours, hungry as ever. Then, during the day, he was feeding almost every hour!
Then I check my email and see "Your baby at 6 weeks" email from BabyCenter. Apparently, 6-weeks is another growth spurt; one of the tell-tale signs is constant feedings. It all makes sense now.
Nolan is all about punctuality - he was born on his due date, and now he has started his growth spurt EXACTLY on his 6-week mark!