Brown Discharge Before First Period

   I haven't gotten my first period yet. I recently went to a four-day basketball camp and while I was there, I noticed that I had a particularly large amount of discharge in my underwear. I figured that was just normal because I was running and exercising more than I normally did, therefore my body was cleaning itself. When I got home, I almost immediately noticed brown discharge. I considered it being my first period but it didn't smell like period fluid, it smelt like regular discharge. I had no vaginal pain or any other irregularities so I ruled out an infections or etc and I understand that this usually occurs when before your first period, however, it stopped. I had discharge for two days, and today is the second day with absolutely no discharge. Is that normal? I know I may be rushing and panicking but if anybody had any answers, I'd really appreciate it. 

Thanks ~