There is a lot more to psychedelic treatment than that.
I have Ankylosing Spondylitis and Crohns Disease and I have found the careful use of psychedelics extremely helpful in managing the depression/anxiety that comes along with those diseases.
As an added benefit, psychedelics allows you to engage dopaminurgic circuits in your brain, thus dampening chronic pain for a time. Sometimes we just need a reprieve. Ketamine treatment is also an option. There are perfectly legal ketamine clinics around the US that offer intervaneous infusions. My pain dropped markedly for about three months, and my anxiety and depression have been largely resolved because of my experience with ketamine.
Read up on a process called 'Central Desensitization', wherein deeply etched pain circuits are leveled out by resetting the central nervous system. This is what psychedelics like psilocybin (mushrooms) and ketamine do so well.
Lastly, I strongly advise you to do your research on these substances and their safe usage. You can't really get addicted, but they are far more powerful and immediate than what your psychiatrist is going to give you. See if you can find a ketamine clinic and consult one of their anesthesiologists. Or see if you can get in touch with a clinical researcher from somewhere like Johns Hopkins.