Hi,
The subconscious creates our dreams to keep us alive during sleep. dreams are dreamt to wke you up when you had enough sleep, need to be woken for some other reasons that intrude into sleep, to make you change sleeping positions, to preserve the sleep when something irritating would wake up and generally to control your life while you sleep.
Spiritual dreaming, lucid dreaming and othern mumbo-jombo are all based on ignorance about the real nature of the subconscious. It does not give a jot about what's going to happen tomorrow or any de-ja-vou.
Drugs, medicines and the state of your health has an impact on how you dream. Especially regarding violence or vividness.
The dreaming content, violence, vividity, strangeness and other unusual features closely follow your state of health and general well being during sleep.