Final answer:
Nancy most likely has Generalized Anxiety Disorder (GAD) based on the description provided.
Step-by-step explanation:
Based on the description provided, Nancy is likely to have Generalized Anxiety Disorder (GAD). GAD is characterized by excessive and persistent worry and anxiety about a wide range of activities or events. Unlike specific phobias, panic disorders, or social anxiety disorder, GAD involves a general pattern of worry that is not limited to specific triggers or situations.