Hon kanske lider av nattskräck (Night terror på eng.), låter ju rimligt att en sådan stress/trauma/depression kan orsaka det?
http://en.wikipedia.org/wiki/Night_terror
"Night terrors are distinct from nightmares in several key ways. First, the subject is not fully asleep when the night terror occurs. Unlike nightmares, which are frequently dreams of a frightening nature, night terrors are not recalled dreams. Usually there is no situation or event (scary or otherwise) that is dreamed, but rather the emotion of fear itself is felt."