Here's a thought. Just think of yourself in a much broader context - life on earth. In the same way one of your cells comes and goes while your body seems to be

Here's a thought. Just think of yourself in a much broader context - life on earth. In the same way one of your cells comes and goes while your body seems to be continuously present, so too you are one tiny part of the tree of life. Your influence is greatest while you're present, but the effects can last beyond your time here. I would argue from the PoV of consciousness you were not here before and won't be here later, but then it was never about you anyway. Gotta destroy the ego to find your proper place in a larger context - then your question become moot.