I am so sorry for how you are in so much distress.I hope I didn't sound rude in my reply.I know you were doing all you can to help her.I am not in medical field. But I think she feels so helpless that she is unable to help herself. If you don't mind sharing.Was she bullied out of envy.You mentioned she is bright and beautiful.Unfortunately certain positive traits in kids become foculpoints for other kids to bully out of envy.It can be relentless and damaging for life.