My period comes every single month on time. It has since I was 12 years old. This month it is now two weeks late, and I show no signs of my period. I am sexually active, I'm not stressed out, and nothing has changed in my diet or routine. Dizziness, fatigue, and strange pains are being experienced. However, I took two pregnancy tests (2nd day of missed period and 7th day of missed period) and both came back negative from ClearBlue digital. Google is of no help! Any ideas?