About five times recently I have awakened without opening my eyes, but I don't realize it. I'll lie there in the dark, thinking, believing that the sun hasn't come up yet, thinking that my eyes are open. I was awake because I heard things, like rain on the windows, my son's alarm clock going off in his room, etc. Eventually something causes me to Really open my eyes and then I'm shocked to see the room full of daylight. It's unnerving to realize that I was lying there with my eyes shut all that time, not realizing I'd never opened them upon awakening, even though I felt like I had. Is this a problem with my eyes, or brain, or not a problem really?