prey on (someone's) mind

if something preys on someone's mind, they worry about it for a long time.

I lost my temper with her the other day and it's been preying on my mind ever since.

• give someone the shivers
• give someone the slip
• give someone the time of day
• give someone the willies
• give someone the works
• give some stick
• give something a bad name
• give something a free reign
• give something a free rein
• give something a lick and a promise
• give something a miss
• give something a new lease of life
• give something a once-over
• give something a second thought
• give something a shot
• give something away
• give something a whirl
• give something a wide berth
• give something best shot
• give something free reign
• give something free rein
• give something full play
• give something house room
• give something pride of place
• give something short shrift