This doesn't happen overnight, but at least once a week. I go to sleep and during a dream, I wake up but my body is still sleeping. I can hear everything going on around me, but my body isn't awake.I try to move or scream so my husband will wake me. I hear myself making noises, or feel myself moving, but it really isn't happening. It lasts for maybe 30 seconds or up to a minute. When I do wake up, I am very scared. Sometimes the screaming or noise making I think I am doing works and my husband wakes me. He states I sound scared. Why does this happen and what does it mean?