My 2 and 4 year old share a room, recently had to cut out 2 year olds nap as he would not fall sleep until around half 9/10 (no matter how short/long his nap was) and was keeping the 4 year old up and being miserable himself in the morning due to not enough sleep, so now he goes to bed at 5pm without a nap!!!!! But is waking for long periods in the night screaming and I can only think it's that he's overtired, what to do?? :-(