I was in your same situation with our 2nd. They said give it a week (or 2, can't remember exactly... she's 13 now), and when we went back in she was still breech. Fortunately for us, I had a doctor who was not afraid of insurance companies and was willing to try external version (to avoid major surgery). It isn't totally without risk (not much in this world is), but in my opinion was worth at least an attempt.
It was done at the hospital, under strict monitoring, and after administering medication to stop the minor contractions I was having (so minor, in fact, that I was completely oblivious of them, but they showed up on the monitor). Once those were in check, they lube up the belly and watch on the screen while physically manipulating the baby from the outside of your belly.
It wasn't without some discomfort. Maybe I have a high pain tolerance, I don't know. But all I needed was my husband's hand to hold. I didn't even hurt him. I wouldn't call it pain. Really, discomfort is more the applicable word.. because it's tight in there!
After two attempts, the doctor asked if I was doing ok, and I expected him to ask if we wanted to continue. But he'd already turned her. :D
There is always potential for them to turn back around again, too. But that didn't happen. She was delivered about 10 days later, natural vaginal delivery, no pain meds, less than 2 hours hard labor. Easy peasy.
She DID, however, receive a diagnosis the day after birth of having some hip dysplasia (which can happen when they are carried breech). We took her for appropriate treatment and follow up and within 6 months you could not discern any difference in her hips from a 100% normal hip.
It cannot hurt to at least ask your doctor about external version. They may say flat no, b/c the just don't do them (much like they just don't deliver breech babies anymore, they always do major surgery instead). They may give you reasons it's a bad idea. But they may consider it and offer it to you as an option. You won't know if you don't ask.
I'd heard horror stories about the pain... but my doctor said they were likely from people who waited until too late (too close to delivery) to attempt it, when there was less room and fluid. Also, he mentioned that many doctors refuse to even entertain doing the procedure. But it took us all of 4 minutes. And I had a nice salad from the hospital for dinner while we waited for observation before getting to home that night.