Me and boyfriend have been trying for a little over six months now and I'm two weeks late for period. I took a test after a week late and it was negative. I still don't have my period, I get the occasional cramps, light headed and I'm absolutely exhausted I've been sleeping every chance I get. If I don't get my period soon I'm going to make an appointment, but I know my mother had low hormones and needed an ultrasound to prove her pregnancy so maybe it's hereditary? Has it taken a while for people to get positive results?