LOL! No, it doesn't mean you're done for
Death in dreams, as in tarot, tends to mean "change". Death of an old life, or of old dreams or hopes, to be replaced by new ones.
When I was married, towards the latter part of the relationship, I was frequently dreaming that I was committing suicide, or was being killed by someone. You often read of people saying that you never dream of your own death - well, I did, I dreamed of being killed by a nuclear explosion, by swallowing poison etc. And of the nothingness and then the rebirth afterwards.
When I started getting those dreams I realised it was time to act and DO something, and so I lit the fuse of the nuclear explosion and I killed off my old life. I (the "I" that I was then) died, and a new me was born.
Don't be scared, the dreams are telling you that there's something in your life which has to end so that the new you can be born.
It's a GOOD thing. Honest