Find a more empathetic doctor. Bring substantive documentation with you, and demand that the tests be performed. Many physicians are completely conditioned by the medical culture, understandably so. A good one thinks outside the box, is a good listener, ..and ignores his "press."
A good private practice is very often the "mid-size" neighbourhood one with several practitioners offering various sub-specialties to general practice, and for example the ability to conduct Xrays, do minor emergency surgeries, etc; these tend to be dynamic, self-reliant, and encourage empathetic patient relations. These practices tend to be able to attract, and retain very good physicians who actually enjoy serving the needs of the patient. General practice is a dying breed in many areas. Hope this helps, but I doubt it. Personally, I would take my case to however many physicians I had to in order to get heard.