Thanks for the query.
The bleeding you had could be due to injury
during coitus, as it will take around one week to heal.
It can also be breakthrough bleeding
due to missing the pill or alteration of the time etc.
So better to avoid intercourse till the wound heals and after that use additional method of contraception
till this pack completes.
If you miss withdrawal bleeding go for pregnancy
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429