I think after you die it's exactly the same as before you're born. nothing.

Unless living beings have some sort of ability to create spirits while something is in its womb, how would eggs, plants, and larvae get spirits?  Could it happen right when the egg is fertilized or created?  Seeing a that would be the only possible way, doesn't that mean all the baby's that have died before being born had souls?

Because of that, I believe wee have no souls and the "You" is created by random brain activity, and when it dies, "You" die too.