If my Doctor and Dentist both write me prescriptions for opiate pain meds what do I do?

I suffer from chronic lower back pain, which my doctor writes me opiate pain medications for, usually about a month's worth (its not a set thing, but it usually lasts me around a month and I usually send in a refill request through my pharmacy around the same time every month) and I got my refill 2 days ago, but the day before my refill came through, one of my wisdom teeth broke in half exposing a nerve. I got an emergency appt with my dentist and he checked it out, he recommended that I get the stump of that tooth surgically removed as well as the other 3 wisdom teeth. While in his office he offered to write me a prescription for pain meds to last me till I get an appointment with the oral surgeon, but I told him, "no, I'm ok for now."

Im supposed to take my pain meds based on how bad my back hurts (some days a lot, some days a little or none) but since my teeth and back are both killing me I've been taking a lot of my meds and am sure to run out while still in pain. I know that the oral surgeon will prescribe me meds in a few days when i get the surgery, but will I get in trouble at the pharmacy for having a second prescription of pain meds filled from this second source?? I live in California and someone told me you can get in trouble for similar situations or something.