Anxiety is simultaneously meaningful and profane.
It is physical (I am PMSing; I am ill; my head hurts; I sprained my ankle), emotional (I can't think, my eyes well), psychological (what if it could be better? why me? do I feel something else hurting?), existential (why is pain not meaningless?), intensely personal (how can you know what I feel?) and surprisingly fleeting (it will be better tomorrow; or at least different).