Many places i go i keep invisioning myself in many death related situations. what could this mean/be?

Fear anxiety: You can direct your thoughts to to more positive areas, you should seek counseling.

OCD?: This could be a possible symptom of obsessive compulsive disorder. Regardless of the diagnosis, it is causing you anguish. Recommend a comprehensive psychological assessment with either a psychologist or a psychiatrist. Cognitive behavioral therapy may be very helpful.