... Do I have to have another form of back up birth control after having unprotected sex while being on the 3rd day of my 1st week of a new pack of pills? I am not sure because the instructions state to have a back up to avoid pregnancy while starting on the first week of the pill pack. Does that mean the very first time you begin taking Sronyx or for every month? This will be my 3rd month on Sronyx