I dont know if this is the right forum but anyway.
I have a problem i have the fear of running out of time. Im only 15 but since about a year i think about it at least once a day. I feel like my life is so short and the days passes so fast. I don't have a lot of friends but a few very good ones and im doing fine in school, but still i feel like it's not enough and that i should use my time even more efficient. It's starts to really annoy and depress me but i cant stop thinking about it, it's always in my head.
I don't know what to do, can anyone relate

Sry for any mistakes im not a nativ english speaker.