agonize (oneself) over

agonize (oneself) over

To worry excessively, especially about a decision or past action. Please stop agonizing yourself over this decision. It won't really matter which one you choose. There's no need to agonize over what you said to him. He probably doesn't even remember.
See also: agonize, over
Farlex Dictionary of Idioms.

agonize (oneself) over someone or something

to fret or anguish about someone or something. Now, now, don't agonize yourself over the situation. Time cures all.
See also: agonize, over
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • agonize
  • agonize over
  • make a decision
  • make the call
  • be in (one's) hands
  • landmark decision
  • settle on
  • settle on (something)
  • support
  • automated decision support