on your conscience

on (one's) conscience

Causing persistent, nagging guilt for something one has done or failed to do. It's because of your cruelty that your brother died. I hope you have it on your conscience for the rest of your days! I really regret the way I treated her in high school. It's still on my conscience to this day.
See also: conscience, on

on your ˈconscience

making you feel guilty for doing or failing to do something: I’ll write and apologize. I’ve had it on my conscience for weeks.
See also: conscience, on