I don't think my reply will be very helpful to anyone but here goes.

For four months I have experienced a range of symptoms that could be Giant Cell Arteritis (formerly Temporal Arteritis).

I have run the gamut from very mild, intermittent temple pain, to moderate temple pain, to stronger temple pain (always in the exact same place), to balance issues, to blurry vision. At present the pain is very mild and no other symptoms.

I went to a neurosurgeon. He said likely GCA. My ESR and CRP blood tests have always been low normal: ESR = 2-5. CRP = < 0.30/dl. Saw Opthamologist. He said GCA unlikely but possible. My PCP said the same. He started me on a week of 15 mg prednisone. I see a rheumatologist on Tuesday. Depending on how I feel with the Predisone (just started), I will probably acquiesce to a GCA biopsy at my temple. Because of the possibility of sudden irreversible blindness with GCA, I am pretty terrified. I don't think the blood tests mean that much. Opthamologist says he has seen patients with GCA and normal or lower test results. Keep advocating for yourself. Where I am in the U.S. you need to. Good Luck!