Does plan b push original ovulation date up? husband and i had unprotected sex on cycle day 23 after had taken the pill in my fertile window. i didn't take plan b the second time figured we were safe. period one day late. is there still chance?

Maybe: A pregnancy test will be positive as soon as the first day of your missed period. For accurate testing, the first morning urine should be used. The initial signs of pregnancy are breast tenderness and enlargement, nausea and dizziness. Typically Plan B disrupts the hormones needed to ovulate, and implant a fertilized embryo. It can cause bleeding to be delayed, more heavy or longer lasting.