3yo DD (will be 4 in October) and we have a few issues.
When she was 2 we took the dummy away and since then I have had to stay with her while she falls asleep. Then she will wake in the night (no set time) and come in with me. At which point DH goes into the spare room.
She hasn't woken up in the morning in her own in months. I'm knackered because I don't sleep properly when she's in with me.
Added to the mix it's summer so I'm sitting next to her bed at bedtime until 9pm some nights. She's just not tired despite being physically worn out. She's wired. It's dark in her bedroom but she can hear the birds and just tell it's still daylight. Sorry for a ramble. 
