I had unprotected sex on 28 august. within 24 hours I take ECP tablets and I started bleeding after 6 days and it is remains for 6 days after 10 days I took a pregnancy test and it is negative I wait 2 days more n then I took test again it is still negative. After I missed my periods it is almost after 23 days of unprotected sex I test again it is negative. But my periods is not come