I need help I am now too tired for rational thought. DS2 is 3 and autistic, he never sleeps later than 5am. I think his behaviour problems may be in part down to overtiredness. We haev tried Melatonin but still no more sleep. DD has a habit of waking at around 1am crying with teething and takes a couple of hours to get back to sleep. I am shattered. DS2 shares a room with DS1 who regualarly falls asleep in school and DH and I are rowing we are so tired. Can anyone help?