What does it mean when you are on your period for three weeks?i started a week early it was light 2nd week it was normal i'm on my third week

Many options: There are multiple options. Hormonal treatments such as birth control pills, Progesterone treatments and the Mirena (levonorgestrel) iud are effective reversible treatments that will help many people. There is also a drug called Lysteda that contains no hormones which will help others. If you are done having children discuss the option of an endometrial ablation. In some cases a hysterectomy will be needed.