I am now 15 day late on my period I taken several hpt and one blood test and all negative I am never late on my period my last one was june 13 -17 normal 28day cycle I have sore breast everyday now I been having lots of acid reflux nauseous every morning peeping a lot gaining weight getting menstrual like cramps off and on has this ever happened to you and were you pregnant or not? Please I need answers