Experiencing something similar. Seems like last week I was young.
It’s crazy. Same sort of abruptness when I transitioned from kid to adult.
Like in that one book:
“How did you go bankrupt?”
“Gradually, then suddenly.”
Applies to the country as well as individuals.
Find those activities worth investing time in, and shelve the rest. We go through life trying to do so many things at once (got to work, get married, raise a family, manage finances, deal with aging parents, ...). If it got to the stage where I felt like I was treading water, I would toss those activities no longer worth my time. Light the load to get the boat afloat.