I feel like I’m going to die young. Anyone else?

(19 M) It isn’t so much that I want to die. However, I have had this feeling for months. I just have this weird feeling that I’m going to die young, and I don’t know why. It feels like odds are, I’m not going to make it past 30. I don’t know why. Does anyone else feel this way? Does anyone know why these thoughts occur?