It's like clockwork- every time after she goes down for a nap, after 1 hour she gets up. I'm trying to figure out if this is part of the sleep cycle where they go from light sleep to deep sleep. She'll wake by cooing, talking to herself, sucking fingers and I can hear that she's trying to put herself back to sleep but she can't do it so after 10 mins or so she starts crying! And I know she's tired because she won't stop yawning... What should I do. Should I let her cry in an attempt to fall back asleep? Or Am I doomed to a 1 hour nap cycle forever!! (dramatic I know!)