I have a 4 1/2 year old son and we have had every thing with sleep going. He dropped all of his daytime naps by 7 months, he had such severe night terrors between 18months and 3 years that he was investigated for sleep epilepsy. He regularly refuses to go to bed, is often awake multiple times in the night or for a long stretch in the night and starts the day early.
Whilst it appears that he might not need the sleep I do and the lack of sleep endured over the last 4 1/2 years has completely destroyed my health and my relationship. Whilst He visits his father fortnightly so i can have some rest bite 2 nights sleep uuninterrupted is not really denting the deficit.
We also have had behavioral problems which I suspect both are part of the sleep problem and caused by the sleep problem. But the medical profession have been rather unhelpful saying it will improve when he starts school. they said that about nursery and we had no improvement then. So we are running out of ideas.