The pain you describe in your arm matches my experiences pretty closely. I ended up having a C4-7 ACDF and the pain is 98% (and improving) resolved at six months post. Remarkably, with the right neurosurgeon, an ACDF procedure can be pretty straight forward. While scary at the time - in retrospect, I recovered fairly quickly with noticeable symptom improvement almost immediately and a return to near normal in less than a month. But of course, your situation is different and your recovery will be, too. I suggest getting a diagnosis from a top spine specialist (I like the idea of a neurosurgeon over ortho) using the latest equipment (I had MRI + X-ray) at a first rate facility (Mayo for me). I didn't see your age...but "fixing" what you are now experiencing is a worthwhile objective.