Hi, my first day of my last period was January 20. I had unprotected sex on February 1, 2, 3, 4. Not paying attention to timing, i took plan b. On the 2nd (before taking the pill ) i noticed mild consistent cramping that seemed to lighten up on the 4th for a few hours. After taking the pill it obviously started up again. What are my chances that Plan B worked or not? My cycles are typically 29 to 30 days.