I'm 13 years old (as of 2 months ago) and I haven't had my period. Today, when I was going to the bathroom, I was wiping and I saw that there was a bit of brown on the toilet paper, so I wiped again and there was more. I checked my underwear and I saw more brown stuff. I know it isn't poo because it wasn't near the back of my underwear and it was clearly under my vagina. I'm guessing it's some sort of discharge, but I've only had white discharge until this point. It doesn't smell, and it's kind of gooey but not really. Is this normal, and does it mean I'm going to start my period soon?