My baby will be 6 weeks old in a few days and I was wondering when was a good time to start trying to break her habit of only sleeping in my arms. She will fall asleep in my arms and as soon as I put her down she freaks out and when I pick her up she goes right back to sleep. I know that newborns need to be held so I was wondering at what age I can just let her cry herself back to sleep. Also how long should I let her cry before I pick her up. Thank You for all who give me advice.