Well if it's a nasty brown discharge my advice is get to a health care professional and have her check it out. It could very well be a sign of infection, but since I don't know any other symptoms (how long you've had it, when it occurs, the smell, anything else associated with it). It's quite difficult to saying anything about what it could be.

Get thee to a doctor.

I had the same b4 my doc just said its a sign that I will b comin on my period

Well I also have a question, I have never gotten my period before and very unusually I am getting a large amount of brown discharge. Im really not sure what it is and i'm too scared to see a doctor. I don't think it's anything serious or an std because I haven't been sexually active. It also doesn't smell like anything and im almost positive it's not blood. Help please?