Nightmares of Murder

Kori is having terrible nightmares - nightmares that she has murdered someone - so often that she can't sleep at all. Her new co-worker hates her. In fact, he is making a career of irritating her; and now her lack of sleep is beginning to affect everything she does. Everyone has suggestions, from sleeping pills to psychiatrists. Can anything help her get beyond these nightmares and get to sleep, so she can just go on with her life?