Why do I have these drems of reincarnation were Im seeing all my other lifes & how I dyed?

In my dreams, When I die I see what the end of my life will be like & im so scared of it. It is so real then I see all my other lifes where I see who I was & I seem to die young, its like reincarnation . So When I wake up Im still shaking. Am I seeing my death or am I so scared of dying I'm starting to dream of it.