Spotting?

Kris
I wasn't sure where this belonged but: 
I've been spotting the last 3 days randomly. I don't normally spot and it doesn't hurt or anything. Perhaps there's a smell that's not normal, but it could be just blood smell. 
It's not much, just light spotting, but it's making me nervous. I'm not on birth control but I have been stressed due to a lot of school stuff.
Is this okay? I have my first pap appointment next week (I wasn't sexually active until November, but even so, I know I should've gone sooner.) so I can ask her then too, but in the meantime, I was curious if anyone had ideas. My period was on the 15th last month, but I'm irregular. 
Thanks!

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