Welcome @barbn1234, If it were me and I had a doctor or internist who was not willing to work with me I would be trying to seek help or a second opinion with another health facility. Something else that you can do is learn as much as you can about your condition by reading information from reliable health sources. Here's a discussion that you may find helpful when searching for trustworthy information.

-- How do you identify trustworthy health information?: https://connect.mayoclinic.org/discussion/how-do-you-identify-trustworthy-health-information/

Are you able to seek help at a major teaching hospital or health facility like Mayo Clinic?