HELP! Last night he did it AGAIN! Was up at 3.30, talking to himself until 4.30. Then started to cry, gave him paci, was quiet until 4.50. Then he wanted to eat so fed him. Then quiet until 5.30, got up at 6.30. What could be causing this? Is it a developmental thing? He will be 5 months in 2 days. Naps were 1 h straight and 2.5 hour with a lot of interruptions.