I started having a brown didcharge for a while now. Well... for about 13 days now. I don't think I actionaly came on my period just have been have some discharge. I usually stay on my period for about five days and its been thirteen. What could be wrong?

Pregnant? Brown discharge is not actually your period. Is it possible that you are pregnant? Or taking medication that would interfere with your period perhaps? Or did you stop taking birth control, or start taking Depo Provera. It is really too hard to say without more info. If you are concerned you should see your doctor. :)