Honestly, I think all women are different. I have only been late twice...hence the two children sitting in the other room. And both times I was late the tests came out positive. I still have them..(is that gross??) If I were you I would just go to the doctor and get tested. But, are you experiencing any symptoms of early pregnancy? (Breat tenderness and swelling, heightened sense of smell, exhaustion..) I think you should go on your instincs. I knew both times, just a gut thing. But if you go to the doctor and you are not pregnant, missing periods is a symptom of several gynecological issues, so maybe you should rule those out as well. Good Luck~