okay so i had sex on feburary 22nd 2012  and today is september 14th 2012. since i had sex i have not had a missed period. and ive had every single period. but my periods have always been irregular. since i had sex i have not done it again the only thing my boyfriend has done was fingered me. no penis to vaginia contact. and we are always careful with whtever we do. this time i have had light brown discharge for a few days and i have no idea what it is and im really scared please help me!! thanks