I know it’s been a while since your post but my advice to anyone with symptoms of Giant Cell Arteritis (GCA) go to an emergency room and let them know what you suspect you might have. If we’d known this we could have saved a lot of time and aggravation. In the end my husband ended up in the ER which is where we got the most tests taken and the best treatment. His rheumatologist didn’t want to believe he had it. Not sure why since he had all the symptoms other than vision issues.