気のせい
気のせいか
気の迷い.
I am depressed in spirits―in low spirits―low-spirited.
気がすむ
One's mind is on the stretch
He is touched―cracked―crack-brained―unsound in mind―not in his right mind―out of his mind―out of his wits―out of his senses―off his head―not right in his head―wrong in the upper story―His wits are wandering―His reason wanders.
to be anxious about something