The results from a HPT test are valid if the test is taken not more than 5 days before an expected period. This means that any testing made after an expected period (as you have done) is valid. Your test was negative, so you are not pregnant. There can be “ovulation bleeding” or “vaginal bleeding during expected periods in confirmed pregnant women”, but such a thing as “implantation bleeding” doesn’t exist. According to your history, I believe that you have had a kind of false menstruation (pseudomenstruation). Pseudomenstruations are typical in women who experience cycles without ovulation. They happen during the expected period-time but bleeding is not the same as in real menstruations and there is no cramping (as in your case). A hormonal active follicular cyst in an ovary can cause such menstrual irregularities. You can go to your gynecologist for ultrasound examination to rule out or confirm this possibility.