I have not been sexually active and i am three weeks overdue for my period, i've had my period for seven years and i am rarely ever irregular or late. In fact, i've been pretty much regular for three years if not longer.

I have not had sexual intercourse and i even took a pregnancy test yesterday to make sure it wasn't that.

today, i found brownish discharge in my underwear, and just now when i went to the bathroom, there were huge gobs of brown/darkred discharge whos' consistancy is mucus-like. when i wiped there seemed to be blood.

is this something to be concerned about? or my period just finally coming? this usually doesn't happen before my period, if anything i get brown discharge afterward.