Alot of pain can come from other muscles overcompensating trying to protect the joint. I know with my facet joint pain in my lower back, this causes hip pain that radiates into my groin and also bum muscles tighten as well and all this happens to compensate for the arthritic facet joints and small muscles that control them call multifidus. When i had my first facet joint block which is when they inject local anaesthetic into the facet joint and if its the source of pain you get immediate pain relief for a few hours, this is for diagnostic purposes though, but i also got an immediate relief of pain from all these other muscles that have been trying to compensate from the pain, it was a very weird feeling at first and i originally thought this hip pain was possibly unrelated but as it turns out its all connected. I think as far as docs diagnosing where exactly the pain is from is something they cant really do or tell as there a few things within the back structure that can cause pain. I have heard of others have terrible back pain with no abnormalities on ct-scans and then others who have horrible looking ct-scan and have no pain, i think its all a trial and error thing with procedures and drugs etc
Have you looked at facet joint ablations for cervical facets, it may not give you 100% relief but can decrease the amount of pain by alot and is not a complicated procedure and no post recovery period like an operation, basically walk out that day, though they did say to me u can get some neuritis for a week or so afterwards.
I hope u get it sorted soon, pain can really drain your energy, thats for sure.
good luck,
cheers!!!