Help.... please...? :)

ok im a little embarrassed to ask this but i need your help. ok so recently when I went to change my pad when i got inicial from school my blood turned brown. like i put my pad on at 7:00 AM but i take it off at like 5:00 PM. and when my period ended, my distarge is now a little brown too. but its usually clear o a little white. i take great care of my "area" and I'm still a virgin and im NOT pregnant. so uh.... any ideas of whats wrong?

Thanks~!

~lumforever~