Please bear with me, this question is a little gross, but I had to ask. Ok, so, I am 13, and got my period 5 months ago. I have skipped 3 periods in a row! I am very worried because I recently started having vaginal discharge I am an athlete, but I never would have said that I exercised excessively. Can anyone tell me what is going on?

Perfectly normal at your age.
You're still growing and your cycle has yet to become regular.