nothing. a total lack of existence more profound than the deepest sleep. your mind, your identity, everything you worked for and thought and did in your life is gone. you go nowhere, you feel nothing, you think nothing. you are only real as other people's memories about you, and soon, they will die too. your person, your character, and your imprints will fade into obscurity with every passing year.
insects and bacteria are gonna consume the hard parts of your body, then your bones are eventually fossilized or simply turn to dust.
eventually, the sun will grow to a thoushand times its mass right now and consume the earth entirely before collapsing in on itself, destroying every trace of you and everything you ever came to know.