What's the Word?

Your choice: 
maru mori (“the heartbreaking simplicity of ordinary things”); 

apolytus (“the moment you realize you are changing as a person, finally outgrowing your old problems like a reptile shedding its skin”);

the wends (“the frustration that you’re not enjoying an experience as much as you should… as if your heart had been inadvertently demagnetized by a surge of  expectations”);

anoscetia (“the anxiety of not knowing ‘the real you'”) or 

dès vu (“the awareness that this moment will become a memory”).

Or perhaps you'd choose Agnosthesia or Zielschmerz?
They're all there, waiting for an English Scholastic Aptitude Test (SAT).
-bill kenny