<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing heavy menstrual flow, unpredictable menstruation, pelvic pain, and painful menstruation. What could be the reason for these symptoms?  <response>: Based on your symptoms, it is possible that you have polycystic ovarian syndrome PCOS. It is a hormonal disorder that affects women of reproductive age, and it can cause irregular periods, heavy bleeding, pelvic pain, and painful periods. 