Did the person talk about it with friends and it went out or did shr purposely wanted to hurt you? If you don't know for sure, be smart and go talk to her.
Wanting to hurt her badly is just very childish imo. This is going nowhere and you'll just make things worse.
Especially with the school thing. If someone would ever do that to me, trust me, I'd do all I can to get them expelled. It's just stupid.