Greater Troubles

(SEQUEL TO OP!!) Ever since she came back to Hogwarts, Olivia has been having strange feelings, like she's being watched, followed. And she doesn't trust the new Professor. Things just get worse when Harry is picked for the Triwizard Tournament. Slowly everything is falling around Olivia and nothing is going right. So what will happen as things go from bad to worse? When Olivia feels like she can't turn to anyone for help?