Well, the X-Ray has shown a degree of spondylosis (wear and tear) and may be due to the situation of past injury indicated by dotty.
However your symptoms suggest a herniation of the nerve roots emerging from the neck and this can only be confirmed by an MRI scan.
An urgent MRI scan is in my opinion only provided in the case of a life threatening disorder and I appreciate that you are having severe problems, but it would be stretching the imagination to describe them as "life threatening."
You should see your GP and get a referral to an Orthopaedic surgeon, but in the meantime persevere with the naproxen and dihydrocodeine.