Hello. I m sorry you re having problems. Your rapid weight gain and abdominal bloating are a bit worrisome, but it isn t possible to identify the cause without an examination. Liver disease could account for such symptoms, and in rare patients Nexpro has caused serious liver damage. If your ovaries were not removed during your hysterectomy five years ago, your symptoms could be due to problems with your ovaries. Congestive heart failure can cause abdominal bloating and weight gain, too, although you d probably have additional symptoms if you had heart disease (shortness of breath, poor exercise tolerance, lightheadedness, etc.). I suggest you see your doctor as soon as possible. This issue deserves immediate attention. I hope things go well for you.