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Sleep disturbance due to dreams leads to stress
, which again forms a visicious cycle leading to more disturbing dreams.
Try sleeping at regular time, and getting up early so that you can sleep earlier at night.
How long have you had this problem? Have you taken any medicine for this till now?
Was this problem triggered by any particular incident? Are you undergoing any kind of mental stress (work related/emotional/family/relationship wise) ?
You can try homoepathy safely for sleep disorders.