My son is 23 months old and suddenly his sleep has gone awry. We had him in a really good routine and he would go to sleep on his own no problem and sleep all night. One night about a month ago he woke up crying and ever since he hasn't been able to go to sleep on his own or sleep through the night. He has to have me (mommy) lay with him to get to sleep and if he realizes I'm not there in the night he wakes up screaming. He also has had some sleep terrors. We don't have a new baby and this started happening weeks after moving to a toddler bed so I don't see those as the problem. Does anyone have any ideas? I am at my wits end with this!