margaret is a woman diagnosed with generalized anxiety disorder who also has a history of family trauma. margaret feels a surge of anxiety and calls her doctor reporting the following symptoms: chest pain and fast heart rate, difficulty breathing, nausea, headache, and stress about losing control. margaret has no history of heart disease, but there is a family history of anxiety. she is currently undergoing lots of stress at her employment. margaret has experienced these symptoms once a week for three months. her doctor sends her to the er and she gets a diagnosis of panic disorder. why is margaret at higher risk for panic disorder?