Forget the doctor! No need to do fancy physical therapy. Here is a DIY book for your neck pain. I think it is worth noting that your pain can vanish with a helpful additional purchase of the cervical roll.
Regardless of the quality of information, let this one go. 1983 is too old to be trusted. Props for showing a computer in an office setting in a book from 1983. Those weren’t standard issue (at least in my neck of the woods) until the mid to late 1980s.