hi am 16 i have been with my bf for a year and my last period was the 7th of January 2013 and it stopped half way threw then when i wasnt due on around the 24th of January i was i spotted only once though. i was due on this month on the 7th i was two days late and me and my bf had sex and i bled a little but i i didnt bleed after then yesterday i had brown discharge i have done two pregnancy tests and they where negative and today am bleeding a tiny bit again am confused dose anyone have any advice could i be pregnant i normally have regular heavy periods.