had sex and lost my virginity on july 19th on a Thursday. its now sunday july 29th and yesterday i had symtpms of my cycle starting and i spotted. Earlier today i had brownish dishcharge. My last period was july 2nd. I take birth control to help my endometriosis. Some one please help me. Im 16 years old and im praying that im not pregnant im so scared. I meed answers please!!