Okay so today I went to the restroom to do my business and my underwear is all full of this brown goo and when i went to wipe there was some on the toilet paper. When I go to wipe some more there is a lot of red (blood maybe) on it so I try to get rid as much of it as i can. By the way the brown goo on my underwear has leaked into my leggings. I am 13 and I'm almost 14 only 2 more months and ofcorse I'm a female. In the toilet there's nothing but little brown strings floating around and a few red dots sitting on the bottom. Does this mean  I have started my period? ( this has happened like once or twice before)