Hi and welcome to the board!
I am close to you, also in Co. and I will try to see if I can help you out with any info or remedies. I have four other docs IN my docs practice who are holistic docs, and have really good ideas, ect.
There might be a dietary source that could be leading to your sores, its a thought. Many thanks, and hopefully you can get some relief. I dont know of many docs that would prescribe narcotics for mouth pain other than a dentist for a tooth extraction, ect, but there must me someone out there that can help you or something that will help~
xoxoxooxox
IZZY'SMOM