I have a disability that causes pain too, so I empathise.
Alcohol was really woeful as pain relief, for me tho, and caused immense damage besides.
I totally flunked out at being my own Dr
I worked out a pain management programme with my GP - not only meds but lifestyle changes and exercise.
It works better than my own attempts at self medication ever did.
I was honest with my Dr about my past.
I never feel high from the meds - they deal with my pain. End of story.
Best of luck with your appointment
D