Welcome to icliniq.com.
I understand your concern.
I understand it is quite concerning to have apparently dissimilar reports on two tests, especially when you are having specific and persistent symptoms. However, the good news is that MRI (magnetic resonance imaging) is almost the gold standard for spinal imaging, so if MRI has ruled out ankylosing spondylitis, it is conclusive. In fact, the ligament ossifications and reactive sclerosis identified on the X-ray point more towards degenerative spondylosis or reactive changes. So, you can quite rest assured on this point. However, you may still need to consult a neurologist regarding the pins and needles sensation and get some physiotherapy or other relevant treatment for the disc protrusion mentioned in the MRI report.
I hope the matter is clear to you now.
Regarding follow up: