Bear with me. I don't mean to make light of the subject but, when people get hot they have nightmares. I know it's true for children. I babysat kids who would wake up hot and sweaty and frightened. I'd strip back a blanket, remove socks, and voila, peaceful sleep without waking up ever half hour. I swear it works.

But the problem is, when people get anxious, we get hot. So I guess you have to deal with the problem to keep it from making you anxious, so you won't get hot and won't have nightmares.