It wasn't anything we did or didn't do. Jamey just started sleeping again. He naps about 3 hours in the morning. Another 90 minutes in the afternoon. And about 9 hours at night.
If it was developmental, he's getting up on his hands and knees quite a bit. He can scoot on his tummy all over the place.
Whatever it was, I'm glad we're passed it. I love sleep.