I first went on the pill at 16 to help lighten and regulate my periods. Worked really very well. Once I came off it (couple years later) my periods remained lighter. Over the next 10 years or so they got to be heavier again. Another course of a couple years lightened them up again. I don't think I experienced weight fluctuation due to that. My mood was better since my periods were lighter and I didn't feel as crampy. Different pills do affect different people differently so it really is about giving one a shot and seeing how you find it. Luck.