DD is 4.7yrs and definitely has major ASD traits. She sniffs and licks things, she hates noise, she can be socially awkward (almost rude at times) and so on..
Since accepting this and seeking professional help (well on the way to dx, got parental support - lots of positives) things have got easier for us (DH and i) as parents, we have much less conflict with DD and have had to lay back so far we are more than horizontal.
Apart from bed times 
This past month have got more and more stressful, trying to get DD up the stairs and into the bathroom is a major conflict at the best of times, 6 days out of 7 end in her shouting and screeching at us, we try not to play 'tag team' but it's the only way we can cope.
The past week she has been waking an hour after falling asleep, and is very fretful - will not be comforted, and this carries on all night. Sleep for about an hour, then fretful and crying until she falls asleep again..and so on
No way is she getting a decent sleep, but is up well before dawn (5.30 - 6am most days) and i certainly know DH, (adult) DS and i aren't!
She is shattered, she's stroppy, she's argumentative and when she's not like this she's almost catatonic. She's unresponsive, verbally, physically and facial expressions go by the wayside.
I know she's finding the whole Christmas thing a lot to deal with - every day starts with a countdown, a counting song/game and the obsessional rituals are becoming so much more important.
A couple of close friends have mentioned Melatonin and how it helps children with ASD to sleep - i've read a little about it and agree it looks like it will help our DD (and us [gulps]) no end, but wondered if anyone could share with me how they went about getting it prescribed?
I have got a telephone appt with our (very good IMO) GP, and am hoping he will agree to this for her, i'll even pay if needs be.
Any tips for me?
Apologies if i don't get back to thread tonight, i can hear her singing and kicking and she's been in bed a half hour already