What comes out when we Sleep?

I'm sleeping peacefully, then something comes opens my eyes and hurt me easily. But I'm tired, why should I do what they want? Can I live without disturbing creatures? I want more sleep, Why? What comes out when we Sleep? There are things who scare me enough to cry all night, is the creature bad mental health? I'm OK for now, so are you, let's be happy they say, but they don't know what happens outside in the bay. It's so hard but so easy to just close your eyes and die for the moment, it's easy not to be afraid just give in.