I sometimes have dreams and thoughts of death what do you think?

It would depend on the dreams and what is going on in your life
Death can mean an ending phase and a new beginning of something in your life.
It can mean lost opportunities or unexpressed potentials.
It can mean you are fearing some up coming thing in your life.

I find that very normal. I think most people do dream and think of dying, but they never take great thought to it. When you think about death or dying, try to immediately think about life! See what happens.