Update:

I'm doing substantially better than I was at the time of my original post. I couldn't find a certified McKenzie therapist less than an hour away which I couldn't do with my schedule. I did, however, buy McKenzie's book on self treatment and found it very helpful. It helped me realize that despite my pain being on the left side of my neck/thorax, my right side was much tighter. I took a photo of myself and it was very apparent that my head was significantly leaning toward the right. It's still a tad annoying but I'm no longer waking up from pain and wanted to express my thanks for the help.

Jason