What symptoms were noticed by Cahalan's family and close friends in the book, Brain on Fire: My Month of Madness?

Susannah's boyfriend, Stephen, her parents, and her co-workers all began to see a Susannah that they didn't know. Her mental and emotional issues were followed by physical ones. As the disease progressed, her movements became awkward, her speech became slurred, and she began having seizures. Although doctors kept insisting that her test results were normal and showed no presence of significant disease, her condition only worsened.