Haunted mirror

Hi all, I recently sold a mirror that I had for two years just because I didn’t need it anymore. In the two years I had it served its purpose. Well the buyer recently reached out stating some strange things have been happening to her since she brought the mirror home (e.g. waking up in the middle of the night, seeing things in the mirror, sweating in her sleep, dog avoiding the room the mirror is located). I don’t have a dog but I didn’t experience any of the other things mentioned. Now I’m paranoid that I had a haunted mirror I didn’t know about. Comfort me lol