I am bleeding after taking postinor 2 twice last week. i don't know if it's an early sign of pregnancy but this is two weeks before my regular period ?

Bleeding: If you are bleeding, probably you aren't pregnant but to be sure, you can take another urine pregnancy test. Possibly the bleeding is from the postinor.

Expected bleeding: Emergency contraception disrupts the menstrual cycle so often some irregular bleeding occurs. If you think you might be pregnant check then check a home pregnancy test. They are cheap, reliable and available at any pharmacy. Consider starting birth control so you do not need to take emergency contraception

Change in period: Likely due to hormonal changes associated with postinor. Bleeding is not a sign of Pregnancy.