Crisis

I have hit an identity crisis. I have been left wandering, wondering where to turn and what I can do to actually make a difference in the world. And is it worth it, when all is said and done? Or is it merely words on a page? Empty accomplishments? Will any of it really matter? Can someone really "make a difference"?
When all is said and done, when my little life is over, will it have meant anything? Anything at all?