Had anyone experienced this,my 3yrs 7months sons,cry in his sleep,I try to calm him down thinking he having a bad dream. he open his eyes still crying,with tears rolling down,so I know he is not pretending,saying his knee hurt.I know he had not have a fall, he was allright b4 I put him to bed.This waking up and crying happened on and off.I and my son sleep on diffrent beds in the same room.I am a single mother.I am clueless about this problem,& it getting me worry.please help someone out there,anyone.