Ive been feeling run down and fatigued for almost two weeks now, feeling dizzy and headrush when getting up from chair or bed, feeling nauseous mainly in the evening but varies, lower abdominal cramps and pain, extra discharge, took pregnancy test less than 2 weeks after intercourse, cuz i just thought its pregnancy, test result was Negative... Had temperature for day... Is it something more serious or can it still maybe be pregnancy?? Most people dont have these symptoms so soon though...