about a month ago me and my boyfriend had unprotected sex, ive been having these symptoms for the last few weeks , ive got no period yet, instead ive had reddish and brown discharge , my breast have been feeling sore for the last two weeks, ive felt nausea in the mornings, and lack appetite because of it sometimes, ive also had cramps, around the time i was suppose to get my period, also a fishy smell and pain sometimes during intercourse, am i possibly pregnant?