Took Plan B two days before period was due to start. Still no sign of period. It has been four days since I took the pill. Can I get pregnant?

Typical with Plan B. Plan b essentially disrupts the normal menstrual cycle by blocking or delaying ovulation. That it is how it works and why it is so different than a medical abortion. Irregular bleeding after taking Plan B is not rare. Always check a pregnancy test after using Plan B and see a doctor to start a better form of birth control.