Life is short on Earth, regardless of whether a person lives 3 days, 3000 days, or 30,000 days.
It is not length of one's life that matters, but the quality of the life lived. The goal is not to live a long life, but to live a good life. Even if a person makes it all the way to age 82, that's only 30,000 days. Be brave, take some chances, and don't sweat the small stuff (that means stop worrying).