Hi, my son is 5 years old. Now he is in class 1 . He is very active intelligent boy. My problem is - since last 1 week he is waking up crying every night after 1 hour of sleeping. There is nothing changed in his daily routine or behaviour in day but this crying thing is happening every night . And mostly happens around the same interval of sleeping. Like if he sleeps at 9.30 then 10.30-10.45 pm he wakes up excessively crying. I don't know what to do and we are very worried.