Sorry I didn't think of this last night as I was pretty tired. You should try out Elavil (Amitriptyline HCl) for the nerve pain. I have reoccuring testicular pain (it comes and goes since I had epididymitis), and amitriptyline, pregabalin, gabapentin, and benzodiazepines works wonders for it. Opioids help as well, but I have a largish tolerance to narcotic pain medications and can handle them. If you try out the amitriptyline, you may want to start out at 25mg as these are commonly used for sleep, and even 25mg can be sedating.
With the buprenorphine patches, you can take anything for breakthrough pain, because the dose is so low. Are you on the 5, 10, or 20mcg/hr patches? Have you tried lower doses of the pregabalin or gabapentin? They make pregabalin in doses as low as 50mg and gabapentin in doses as low as 100mg. You could also try Tegretol (Carbamazepine). It's GABAminergic, but does not have the sedating properties that benzodiazepines and GABA precursors have. Normal dosing is 200mg BID.
With the buprenorphine patches, you can take anything for breakthrough pain, because the dose is so low. Are you on the 5, 10, or 20mcg/hr patches? Have you tried lower doses of the pregabalin or gabapentin? They make pregabalin in doses as low as 50mg and gabapentin in doses as low as 100mg. You could also try Tegretol (Carbamazepine). It's GABAminergic, but does not have the sedating properties that benzodiazepines and GABA precursors have. Normal dosing is 200mg BID.