i'm glad to see your doctor got in touch with you and addressed the situation. i wouldnt let yourself feel guilty or ashamed by your self harm, its just an unhealthy way of coping with stress that a lot of people, myself included, turn to in times of great need. just keep an eye on it and try distracting yourself with other things, though i know that can be hard as well.
good luck with the med change, i hope it helps out.