Hi! My doctor said it takes 7 days for the pill (sprintec) to become effective, so I started taking it on April 19th, but had unprotected sex (he pulled out, but still) on the 25th, which is only six days after. However, since I started the pill on the 19th, by the 25th I had taken 7 pills. I guess I'm just unsure of when my seven day count could be started, the day I started the pill or the day after (the 20th?) If it helps, I am very vigilant about taking it at the same time (down to the second!)