Just to clarify, I think you are saying that you have not had your period yet (ever). In this case, sometimes there is some darker spotting before you have your first period. While your hormones are figuring out what they are supposed to be doing, you might get some signs of a period, but not the red blood you would expect. There may be just a small amount of blood that sits in the uterus before it is expelled and turns a darker color in the meantime. If you continue to get more discharge and no vaginal bleeding, see your health care provider. Also, if you are sexually active, there are other possibilities of brownish discharge and you should see your health care provider to rule out any problems.