The fact you exist is almost totally impossible. For one thing, a single proto-you had to beat tens of millions of sperm to the other half of the proto-you at a time when your mother just happened to be receptive to pregnancy. She has to have not miscarried, and you have to have not died in your first year of life. Every coincidence that happened to your parents had to have affected you in some way to shape the person you would eventually become, to say nothing of the sheer unlikelihood of things happening to you. Meeting your first friend, meeting your first love, developing an interest in whatever, all of these rely on phenomenally unlikely coincidences. Just making it to about a year old, the odds are more than 186 trillion to one.