H.B.
My daughter slept in her cradle in our room until she was 3 months. So I agree with the previous answer on the idea that the crib may seem "too big." We also swaddled her until she was 5 months old. We used the velcro swaddles that you can buy at Babies R Us. When she outgrew those we sewed up the arms on her sleep sack and at 7 months she is still sleeping like that most of the time. We are currently transitioning her to a sack without the arms sewed shut. She has been an excellent sleeper, so I am a big fan of swaddling! If you're not swaddling, it might be worth a try. I know it doesn't work for every baby but it has given us many more peaceful hours of sleep. Good luck!