Please help - I am so tired - my DP is so tired - my DD is so tired - we're all just at each others throats all the time, and it's driving a serious wedge between me and DP 
My nearly 3yr old DD has always been a good sleeper until recently, but now for the last couple of months she has been refusing to go to sleep and can stay awake til 10/11 at night. We try the rapid return technique but we can do this up to 100 times a night, and it doesn't change a thing. We have a good routine - tea, bath, teeth, story, bed - which used to work a treat, but not anymore.
Quite often she appears wide awake and bright as a button, so it doesn't seem like she is fighting sleep all the time. But other times she will scream and scream and scream. I will always go in and sooth her if I feel she is getting herself too worked up, but I try and leave her too it. But most of the time she just won't stay in bed.
She is with a childminder in the day and will often nap for an hour or so - we are moving her to nursery in January, so I think our problems will stop once she's dropped the daytime nap and is more active (& worn out).
But has anyone got any coping strategies / hints & tips to help us get through this? We're at our wits end.....