Why do I have such a big fear of death?

Death is a scary concept, and with how bleak the world can be, especially when you hear about other people dying, other families suffering, it can invoke the natural human instinct of self preservation and the preservation of those you care for. If I knew you on a more personal level I could give you a better explanation. But Some people do tend to be more cautious than others. But if you're worried that there's something wrong with you, don't. You're perfectly fine. And having a plan if there's a fire or an intruder is actually a very good thing to do. It's actually encouraged to have a fire escape plan.