Ovulation Spotting

I'm 16 years old and yesterday morning, I noticed after I had peed (sorry for this tmi) that it looked like I had spotted a bit. Not a lot but I put on a panty liner just in case.

Nothing has happened since then and it's the next afternoon. I've never had sex so I'm not pregnant, and I've had no other symptoms - my period is due in 11 days.

Is this normal?