It doesn't seem that your problem would be so bad if it only happened once in a long while. But if its happening all that frequently, it has to be robbing you of real sleep. I'd suspect that some unresolved feeling you have is causing it. I do remember, though, that when my oldest daughter was four she liked to sneak into our bed at night, and she and her mother would actually have complete, drawn-out conversations while they were both asleep. It amazed me, and didn't seem possible, but no harm ever came from it.

I hope you find whatever it is that's disturbing you subconsciously, and robbing you of sleep. Good luck and best wishes!