What type of insomniac are you?

And why is it always 4 or 4.30? The way my imagination takes off around that time and I start worrying about just about everything....?
Earlier, and I am fine, I just go back to sleep. Later is fine too especially if it is summer and light, but it is almost as if I am programmed to wake at 4.30. (And if it isn't me, it's Grace hearing a cat in the garden)

I go to sleep for a couple of hours then am fully awake until it's time to get up. I've tried everything but nothing works. Any suggestions welcome.

I'm none of those. What about the worrier, the 'is this all there is?' 4 a.m. panicker, the 'how am I going to cope tomorrow without any sleep?' clock-watcher...