Dreams

The  most recent question I have had in mind was concerning my dreams.  That has been ever since last Septmeber when I first started seeing them and in November when my dreams became real.
My unusual dreams referring to the lives of people I know and myself, narrating of coming difficulties or dramas started worrying me more than ever. Waking up Friday morning in a horror that tomorrow morning might bring something unpleasant.
What is the nature of those dreams? Whats the purpose of the precaution if you can hardly change something?
Both Sigmund Freud and Carl Jung identified dreams as an interaction between the unconscious and the conscious. They also assert together that the unconscious is the dominant force of the dream, and in dreams it conveys its own mental activity to the perceptive faculty. While Freud felt that there was an active censorship against the unconscious even during sleep, Jung argued that the dream's bizarre quality is an efficient language, comparable to poetry and uniquely capable of revealing the underlying meaning.
Should I believe Freud on this?
Can it be possible that a mentally healthy person would have the knowledge of the coming disaster or in my case, problems? Do we all initially have all our life written on the back of the mind or is it just a message we're getting from time to time?
And what bothers me and makes me even more curious about the nature of dreams is the their source. This way, if those are God-sent or destiny-sent, then ok I give up, life is pre-written and I am just a plaything. If not - then I am the God of myself and well, whoever is reading 
this is too.