Pamela was robbed at gunpoint one evening as she was walking home from work. The assailant dragged her into an alley and punched her repeatedly in the face. A gun was put to her head and she was ordered to hand over all the jewelry she was wearing. The attacker also got away with her money, credit cards, and cell phone. Six months after this event occurred, Pamela began having flashbacks and frightening dreams. She started demonstrating emotional detachment from family and friends. What type of disorder is Pamela suffering from?