My period is now 5 days late but every time I take a pregnancy test is says negative. How long can it take before it will either show a positive or when should I go to the Dr to get it checked out. No signs of period but Moody, sore breasts, nausea, vomitting and heighten sense of smell. if I have all of these symptoms wouldn't my body produce enough of the hormone to show up on a pregnancy test?