Thank you for the additional information.
There are several issues to discuss in this situation.
Since a CT scan was done of the head, that would exclude any bleeding or tumor in the skull as possible contributing factors to these symptom.
If there is evidence of spinal stenosis on an MRI of the cervical spine, that is a far more accurate test than the x-rays done by a chiropractor. The other issues identified by the chiropractor may also be present, but it would not exclude the findings on the MRI. The spinal stenosis may only be mild, so may not be a major factor and may not need surgery, but none of the tests done by a chiropractor can reliably say that stenosis is not present.
At this point, there are a couple of options for management. Certainly, the PT was an appropriate treatment, but since it has not been effective, there are several options to consider. A reasonable next step would be to use an over the counter anti-inflammatory medicine, such as ibuprofen or naproxen. ain that is worse first thing in the morning and at night is frequently related to inflammation, such as from degenerative arthritis in the spine. Using an anti-inflammatory medicine also has the advantage of being an intervention that would not require seeing your doctor.
If an anti-inflammatory medicine is not sufficient, there are several medicines that have been shown to be helpful in management of chronic back pain. The most commonly used are certain anticonvulsants, such as gabapentin or pregabalin, that appear to work by suppressing the firing of the nerves that carry the pain message. There also are certain antidepressants that can help with chronic back pain. While most antidepressants may help to some extent, certain antidepressants have more evidence that they can help, such as duloxetine. These medicines require a prescription, so you would need to discuss these medicines with your doctor.
It also may be helpful to consult with a Pain Management specialist. These doctors can help to clarify the source of the pain, plus can perform specific interventions, such as injections of steroids or numbing medicines, to help ease the pain.
So, it would be reasonable to try an over the counter medicine first, then discuss the other prescription medicines with your doctor, and possibly a consultation with a Pain Management specialist.
If I can provide any additional information, please let me know.