I find myself often waking up at various hours of the night on my back but propped up on my elbows with my head tilted all the way back. My wife says it look weird and very uncomfortable. It's only feels uncomfortable on the muscles in my arms, but I wonder if this is some kind of sleep disorder that I should be concerned about. I have the sense that I am doing this to breathe better, thinking that with my head titled back, my windpipe is opened up. Has anyone else experienced this or is aware of what this might be? Thank you.