Lyrica isn't Gabapentin, it's a common mistake. Lyrica is Pregabalin, a much different medication, although it is sometimes prescribed for the same thing. Pregabalin is more focused on nerve pain and neuropathy, where as Gabapentin is a much broader use medication, and works differently, although it is often prescribed as I said for the same thing, due to being cheaper than Lyrica. They are both horrible drugs to take IMO, my father is on Lyrica for diabetes, and they tried Gaba with me for my systemic Lupus. It sucks. Big time. Even low doses made me feel like a complete Zombie, far worse than any painkiller, as in I would drift off to sleep sitting at a desk, and wake up hours later with drool coming out of my mouth. It does work for some people though, everybody reacts differently.
To the OP, I would go back or try and get a 2nd or 3rd opinion - I agree with the first responder that it sounded like gout to me right off the hop, and it wouldn't surprise me if a doc missed that, as IMO living in doctors offices the last 3 years, they do miss quite a bit of the simple stuff and really on blood/urine screens to do their diagnosing for them nowadays. I feel sorry for you both, I know what constant pain can do, as I'm living with the one disease that causes probably the most constant pain, and the one they know the least about doing anything about it, plus the only major treatment, corticosteriods, I'm allergic to and go into a coma from high blood sugar reactions to. So, I like others here, just live with the pain, and I've gotten accustomed to it, but that's taken years, so I know in the short term how awful life must seem to you both right now. The only thing I can say is just keep swinging, and do what you all you can for her. Just a quick question - did your doctor discuss painkillers and the options both non narcotic and otherwise with you? I'm very surprised they would send somebody home in that much pain that they aren't ambulatory without doing something about that.
