I realize I've asked about 50 nap questions in the last month, but bear with me. The past week, my son has gone down for naps in his crib (yay) without being rocked or nursed to sleep. He cries a little before hand but then falls asleep. But, he still only naps 30 minutes. Sometimes he wakes happy and sometimes he wakes up crying. Question - when he wakes up crying, should I leave him? If so, how long? A few times this weeks I've rescued him and plopped him in his swing and what do you know, he falls asleep for another sleep cycle (and once, even 2!) Bad habit. Reminder, he's 4.5 months.

Thanks!