nightmare nightmare =/

Dreaming about sweet dreams is like the most precious moment you hardly ever get, I don't get it why, I m getting nigthmare almost everyday, like : (Murdering someone I know ? Or..been murdered by someone I know ? ) According to chinese superstitious, does the position of the bed do affects ? Thats the reason I don't sleep well theseday. Sigh, another sleepless night . I don't want nightmare so I don't sleep. What should I say more ? Quite tired now, having 'lessons' tomorrow,wish me sweet dreams.