The world, the universe, the quantum universes, and the quantum of the quantum ones will continue existing for trillions of years, possibly infinite, so the life you proclaimed to have lived well, in its size, will not even come close to a grain of sand in a vast endless desert.
Robb Nash was hit by a truck the winter he was 17. The collision stripped the roof off of the car he was in and knocked him onto the highway, where he cracked his skull. He remained unconscious until the following spring. Now, 16 years later, he offers this advice: "Don't wait to get hit by a semi" to start living with purpose.