I am sure that something has happened in your life recently that has trigerred this phobia
for death. It is very simple to solve if you can logically reason it out. Unfortunately you cannot do it since your unconscious mind
refuses to accept it. If you can see a Hypnotherapist and explain this , he will solve it for you.
Anyway, I am going to help you by the following message.
Every one born in this world begins with biryh and ends with death. The duration of the life is dependent on the life style you live. A healthy environment will usually give you a long life. Ageing is also a process which can be controlled to a certain extent by your habits and life style. One who has healthy habits, does regular exercise. eats healthy food , avoids all intoxicants like alcohol, smoking
and chewing tobacco will be able to delay the process of ageing but cannot avoid it. Someone in your family or friends must have died prematurely and that may be due to some comon disease like diabetes
, or heart attack
or cancer and this must have affected you. So dont worry , you follow the instructions given by me and you will live along and healthy life.