Glad you got your answer from a trained source (the pharmacist), which is good.
But I am concerned that your daughter thinks it's okay to fool around with medication, and that she seems to think taking a pill is like pushing the Magic Period Button to make her life more convenient. You don't say how long she's had the pills without taking them. Perhaps she was just waiting for her period, but if she's been sitting on them for longer than that, it's good to remember that kids conveniently forget things when their lives and friends and summer activities take precedence. It's typical teen behavior, but it's not conducive to regular use of medications.
I'm also concerned that, if she has so little info from the doctor (or got it but ignored it), she may not have listened to much else about pregnancy prevention, sexually transmitted disease prevention, and more. If she hasn't already, please make sure that she spends some time in the doctor's exam room with you not there at all, so that she has a relationship with the nurse and the doctor both. It allows them to all focus only on each other, and it gives the medical professionals an idea of whether your daughter is actually listening to and retaining the info. It lets your daughter know that she needs to step up and be more responsible, and gives her a certain amount of privacy. If she's a minor, which it sounds like she is, you're still entitled to most of the information exchanged, but it's good for all if you are not there as a distraction or as her excuse for not paying attention "because Mom was there."
Please make sure she has, and uses, the number for that office and that she knows she can and should call the nurse with questions that can be answered over the phone without an appointment or a cost.