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I saw the image (the attachment was removed to protect the patient's identity).
It looks like you have scoliosis to the left. The area covered for the scan is correct as in the spinal cord you do not find the lesion at the site of pain. It is usually two to four vertebrae higher. In your case, scoliosis is in the region of the lower cervical and higher thoracic vertebrae. Hence, you are feeling discomfort at the lower levels. As you have not developed pain till now, your nerves are not yet affected and there is no compression or pressure effect on the nerves. The cause needs to be evaluated and the progression depends on the underlying cause. I suggest you meet a neurosurgeon or spine surgeon for a full evaluation. With advancements in medical technologies, I am sure it can be managed surgically.
I hope this has helped you.
Thanks and regards.