Laut Empfehlung der WHO hast Du Schutz nach 7 Tagen, also ab Tag 8

http://www.who.int/reproductive-heal...r_q1_cocs.html

She also can start COCs at any other time, if it is reasonably certain that she is not pregnant. If it has been more than 5 days since menstrual bleeding started, she will need to abstain from *** or use additional contraceptive protection for the next 7 days.

Aber keiner wird haften, dass es dann doch klappt