Won't go to sleep by himself anymore. Wakes frequently through the night and needs someone to be with him to go back to sleep. Also started having split nights. Tried putting him to bed later and it's made now difference. The only slight difference is if he doesn't have a nap we don't get the split nights. Before (two months ago) he would go off to sleep by himself and wouldn't wake in the night needing support to go back to sleep. Help! Thinking about getting a sleep specialist in!!