Not sure where you are located but find the best cancer facility you can find and also get a second opinion. If you have access to the Mayo Clinic, Md Andeson or Sloan Kettering go to them for either your care or a second opinion. You only have one life and fight it with every tool you have. There are real bozos out there, find the experts.
The medical group I've been going to for basic medical care the last few years (pre cancer) were buffoons. The doctor who took my biopsy said he never saw anything like that before. If that isn't a buzz kill, not sure what is.
Good luck and do whatever you can, and leave no stone unturned.