I'm freaking myself out...

The last day of my period was Aug. 6th and the last time I had sex was Aug. 6th. Pullout method. None got around my vagina and I trust him. I'm on ovulation day 4 or 5. The last few days I have noticed discharge, not bloody, but kind of a light brown color. And today during volleyball practice it felt different so I went to check and there was a small amount of blood in the discharge.

I'm going to start senior year next Thursday. My next period is like 2 and a half- 3 weeks. Please help 😭