In the "common speak" we refer to the dead rocks of space. Even in everyday speech there is no need for "dead" to be a concept unique to "after alive". But beyond that, you haven't been careful to define what "I" is, and how the concept of death relates to that "I". Few people would consider you to be dead if you lose your arm, so the concept of "I" for example does not appear to relate to the body. Perhaps not even a single cell in your entire body. So the idea of death as it pertains to your cells is not particularly relevant to the concept of "I wasn't dead before I was born". The "I" we're talking about is undoubtedly your consciousness, and the death of your consciousness is entirely to do with whether the thoughts that you purport as yourself are being generated. In that respect, I'm not sure "you" were even alive until your thought processes reached a certain level of maturity. Can you really say, with conviction, that you're the person that used your name and your DNA at age 4? I'm not entirely sure I can. That kid might have some similarities with me, but I'm not sure that they're meaningful.
From that perspective, "you" will probably die before "you" die. And "you" were born after "you" were born. What does it mean for "your" thoughts to exist after "your" thoughts have existed vs. before?