I am a sixteen year old Girl, I am on birth control, and I just started my last week of pills, (the period pills),
I haven't had my period really, just brown discharge, and its kind of freaking me out.
What could this be?
Thank you.

I had the same problem! :). I was on Yaz and I had the same problem for awhile. I went to my doctor and he just said that it's either the left overs of your last period or the hormone imbalance from the pills :)