I think generally these things might just be called existential crises, and it just so happens that people tend to experience one at around 40. I've also been

I think generally these things might just be called existential crises, and it just so happens that people tend to experience one at around 40. I've also been having one for the past 3 years (the tail of my 20s), which I've been kinda labeling my "quarter life crisis" (which isn't really mathematically right but seems to align with popular usage: https://en.wikipedia.org/wiki/Quarter-life_crisis https://en.wikipedia.org/wiki/Quarter-life_crisis)