I go to a psychiatrist's office, you might be thinking of a ketamine clinic. I have no experience with those. I tried looking into them and saw a bunch of stuff about shady doctors that got arrested and kinda got too nervous about messing with my treatment like that when I know it works currently.

I don't know who Cody is, but I know the other way to get it aside from psychs and specific ketamine clinics is through a pain management doctor. That still needs a prescription though. Again at least in the US, I really can't speak about other countries. The pain management route seems somewhat easier, chronic pain doesn't always have a specific diagnosis to it so you can probably find places where you just get an appointment and ask about it.