Ask HN: Do you feel that time is limited and you are running out of it?

Something keep bothering me recently, it causes me nervous, anxious and even induce imposter syndrome. And when I digged down, I discovered that it's some "You are running out of time" kind of anxiety.

And I can't really solve the puzzle, yet.

Wondering is there anyone whom has a period of time constantly felt like this way? And how did you get out of it?