Sort of a complicated question, I'll try to ask. How was I born me and not another?

[EruptedCarcassBloat]

Alright, I think I found a better way to state the question. Everything from the start of the universe, all the particles in the known universe come from the big bang, or as carl sagan would say, we're all made of star dust. So if I'm just made of star dust, and the rock around me or the cup on my desk are also made of star dust, then out of all the other matter on earth that came from the same place,

-all irrelevant to the question at hand....just flirtation with an inapplicable fascination towards the improbability of outcomes.  

why did I just happen to become a human being?

Because your mother and father were human beings, and it didn't "just happen", they worked at it.  

All the hamburgers that everyone consumes that become babies that mothers give birth to, that came from the hamburgers that their mothers made.

Not an accurate description of metabolism -or- human reproduction.  Babies don't come from burgers, regardless of whose mother did or didn't make them.

I guess it's sort of comforting in a way, because even if your consciousness is destroyed, even if all your memories are disintegrated, once you decompose you go back to the stuff that made you up in the first place. I just wonder, what was the journey like from me being inanimate material to becoming a living, sentient organism.

You..... have -never- been inanimate material.  That said, evolutionary and reproductive biology should clear some things up for you.

Lmao, okay, first of all. The food that we eat is what makes up our body. Without food we would shrivel up and die. So yes, our body is able to transmogrify edible matter into the necessary components to create a baby. Therefor babies do come from hamburgers. 

I really don't think you understand this any better than I do, from what I can see. And yeah, my parents made me, okay. But there was a lot of other matter in the universe that didn't happen to become my parents, it just became inanimate objects. I wonder all the time why I came into existence and am not just an unconscious part of the other vast majority of matter that makes up the cosmos.