A 31-year-old woman presents reporting that for the past 2 years she experiences severe irritability, mood lability, depressed mood, and anxiety that begin approximately 7-10 days before the onset of menses and resolve within a few days of menstrual onset. She describes these symptoms as markedly different from her baseline functioning and states they significantly impair her work performance and relationships. She has been keeping a prospective daily symptom diary for the past 3 months at the request of her gynecologist, which confirms the cyclical pattern with symptom-free intervals during the follicular phase. She reports that during the luteal phase she also experiences breast tenderness, bloating, and difficulty concentrating. She denies any symptoms consistent with depression or anxiety outside of the luteal phase and her mood charting confirms this. She has no history of major depressive disorder, anxiety disorders, or personality disorders. Her thyroid function and other laboratory studies are within normal limits. Which of the following is the most accurate diagnosis?