A difficult question

Question: It is normal that I believe that I will eventually end my own life? I have not immediate or definite plans at all, but a large part of me feels that eventually I will likely at least attempt to end my own life. Something will happen in the future that I will not be able to cope with, or my gnawing anxiety will at some point be too much, and I will simply decide to end my own life. Does anyone else feel like this ? What might it mean?