Even when our death is imminent, we carry the image of ourselves moving forward, alive, into the future.
A novel requires a certain kind of world-building and also a certain kind of closure, ultimately. Whereas with a short story you have this sense that there are hinges that the reader doesn't see.
People write fiction in their minds all the time - every time we read a 'human interest' news story, or a true crime tale, we find ourselves fascinated because we're trying to understand why people behave the way they do, why they make the choices they do, how we become who we become.
The thing that grounds you, and the thing that really gives you a sense of wholeness, is your family, friends and your community. Those are the things that can mirror back to you what you're experiencing, and can affirm to you that the stories you are telling are true.