Wonder when this 'phase' of PCS actually ends, I'll be coming up to a year soon and sleep is still crappy. It's not the waking up early it's not being able to get to sleep again that is the PITA. Even if I'm really tired I rarely get more than 4 or 5 hours before mysteriously waking up, sometimes I wake after only a hour or two and end up drifting off into some kind of half sleep. Last month I thought things were getting better but I was wrong. Maybe one day someone will get the funding to study this, I know lower levels of melatonin in PCS sufferers has been suggested.