Agree w/all above re: CBT. Can even help with pain, believe it or not.
Med wise, you are on no BZDs now? Probably best to keep it that way except possibly something on an as-needed basis if you feel you can actually control that; gabapentin is actually a pretty good med, I find it great for anxiety and also for urges to drink, and doses can be pushed pretty high; with pain in the picture the only thing I can really think of is switching to pregabalin; if you were to go the benzo route, I'd go with Valium as it is long acting, gentle on the come-down d/t active metabolite (unlike klonipin, xanax), good as a muscle relaxant which may help with pain (but pregabalin will help too especially if your issues are neuropathic but possibly generally as well.)
Among the SSRIs Viibryd is by far one one of the better ones as it also has action on 5HT1a, not just reuptake, which is specifically anxiolytic (this is how Vistaril works as an anxiety med beyond just being a histaminergic sedative.) However, while establishing a baseline dose of benzos can indeed help a bit even after tolerance builds, it's best not to take them constantly (either using them as a PRN only, or taking short "drug holidays") and not to escalate the dose, which will only make it harder to get off of; however, psychological dependence plays a bigger role than one might think, given that most of the discussion about benzo withdrawal regards the horrible physical part (which is horrible, worse than opiates, potentially lethal, everything you hear), in this pattern that says "I will just take this pill" instead of actively working to control anxiety mentally (which is what CBT is going to be doing.
Concomitant use of BZDs + CBT is not uncommon and not necessarily a terrible thing, the idea that the meds are to help until the CBT helps and then the CBT will also help in tapering off.) Again, though, choice of benzo is important, XANAX is terrible d/t short T1/2 and liability for abuse, dependence, and behavioral dysregulation being worse than others; klon is harder to come off of than dzp d/t lack of active metabolites, etc. But you probably know all this, so the route that you really need to be taking is CBT ± stable med regime with an emphasis on not escalating dose and particularly not using as prescribed, i.e. sourcing from the black market; as not only will this cost you, it can leave you in a rough spot if your connections fall through. So again, emphasis on CBT.
IMPORTANT: This post or any of my communications are not professional advice nor do they establish a professional relationship of any kind; I make no claim to any professional credentials; in person consultation is essential for any medical decision.