My DS is 4 months (really only 2 b/c of prematurity). I can't get him to sleep in anything else but the swing. DH and I have to put him in the swing at night to get him to sleep and then we transport him to the crib. How can I start to adjust him to falling asleep outside of the swing. If I put him down to sleep in the crib before he's asleep he screams. Don't know what to do. Should I continue to let him fall asleep in the swing and then move him or is there something I can try to get him to fall asleep in the crib?