My DD is 6 months. I feel lucky to say she's always been a great night time sleeper and has never given us a problem going down at bedtime. Usually I put her in the crib and she falls asleep within a few minutes without making a peep. In the last 3 nights, she has not been able to put herself to sleep... After putting her down and leaving the room, she's started to whine/cry and can't fall asleep... I've gone in to try to soothe her/give paci/rub her belly but doesn't work. I pick her up and she falls asleep instantaneously in my arms... I put her down and she's out for the night. She's totally starting to manipulate me! Don't want to make a habit of this - any advice for helping her put herself to sleep again?