My son is 10 months old and quit sleeping through the night a month ago. He wakes up and crys until I pick him up. Now when he wakes I put him in bed with me. He sleeps 4-6 hours in his crib unitl 1-2 a.m. My Dr said he does this because I rock him to sleep every night and he does not know how to get back to sleep on his own. I wonder if this is true. Why was he sleeping for from 3-9 months without waking up? Am I doing the wrong thing by putting him in my bed?