I notice that this is a very common problem here, so I thought I would pass this along.
My wife and I both go through periods where we can't sleep. When I got up to go to the bathroom, my wife said she hadn't fallen asleep yet, I asked her what she was thinking about, and before she answered she started snoring!
I know I do the same thing sometimes, I dream that I'm awake. I know not everyone does this, and we don't do it all the time, but it isn't infrequent especially when we feel stressed. Of course we both feel stressed when we can't sleep! I think it helps to know this. If you don't have a partner, you might be able to use a cheap voice recorder, that will record your breathing.
Just an idea!