If your period is late and all 5 pregnancy tests are negative, then it seems likely that you are not pregnant. When fertilization and implantation occur, a pregnancy test becomes positive 5 days before the date of an expected period. If the expected period doesn’t arrive, this is the first sign of early pregnancy but must also be confirmed with a positive pregnancy test. Late periods are the first (insecure) sign of pregnancy. Other conditions besides pregnancy can also cause a late period. If you don’t get your period in the next 2 weeks, you can go to your gynecologist for an examination to identify possible hormonal imbalances/abnormalities in the reproductive system.