Has anybody ever examined your upper spine? Whiplash can go down as far as T-2 or even T-4. It took over a year to get a chronic problem from C-5 to T-2 healed. I would get numbness in my arm and hand. It was a combination shoulder, scapula, and spine issue. Some call it TOS, Thoracic Outlet Syndrome. My chiro suspected it but did not have the X-ray equipment to image it. A Physiatrist ordered the X-rays and a wonderfully skilled Physical Therapist was able to help me over a period of a year. No insurance for the PT so it cost me plenty. Few PTs have the myofacial release skills to help the spasms release, over and over.

She could just look at my posture and tell if my spine and shoulder/scapula was in proper position. I've never found anybody with her skills. If you can find somebody who does active therapy with myofacial release or similar protocols, you may have a winner.