Over the last few years, my periods have become lighter and lighter. The first two days, it is brown blood and very light. The third day is a regular medium flow period. The final day is a mixture of both, but very light flow. Over the last few months, I have had cramps on the second to third day. I am extremely moody a week before. My periods arrive on time, but I feel my cycles take over my life and I can not get a doctor to listen once they hear that my periods are not heavy. What is the cause of this? By the way, I barely need a pantyliner on the light days.