I have had brown discharge for about 4 hours and then it went away. Im a level 9 gymnast so I'm very athletic and compete worldwide. I'm 13 and haven't gotten my period. I am very confused cause I'm moody and emotional:(

This may be your period getting ready to start. Girls start at different times. Moody and emotional may also be this, but it is common for 13 year old teen girls to be like this.