I would definitely get to the rheumatologist. When I went with a headache to the ER they had no idea what to do with me. At that time my blood work was ok. You could go to your primary for blood work ( especially CRP and Sedimentation levels). A couple of weeks later, my blood levels were not good. It took 4 months to diagnose GCA. If anything else changes dramatically, definitely get to the ER. My best to you.