I had a couple of times that I would wake up, in the middle of the night, for no reason(at least not that I know of), and having this feeling of fear. My heart would beat faster than normal and I would breathe faster too.As soon as I wake up, my eyes are wide open and the first thing I want to do is look around the whole room. That's what I always do. I had it 3 times in just one week. Is this some kind of alarm or something? Is there something wrong? This really worries me. Tell me what you think, please