agonies of guilt/remorse/regret

: intense pain of mind or body : anguish, torture

: the struggle that precedes death

: a violent struggle or contest

: the fact of having committed a breach of conduct especially violating law and involving a penalty

: the state of one who has committed an offense especially consciously

: feelings of deserving blame especially for imagined offenses or from a sense of inadequacy : self-reproach

: a gnawing distress arising from a sense of guilt for past wrongs : self-reproach

: compassion

: to mourn the loss or death of

: to miss very much

: to be very sorry for

: sorrow aroused by circumstances beyond one's control or power to repair

: an expression of distressing emotion (such as sorrow)

: a note politely declining an invitation