Thank you for your question.
From the neck symptoms you have described it seems that the nerve
may be getting pinched again. This is possible at a level next to where you had previous surgery. Another possibility is the nerve getting pinched at the same level which is possible if the vertebrae previously operated upon have not fused into a single bone which is the expected outcome. CT scan
can help with this diagnosis.
Regarding your lower back the nerve may be getting compressed here as well due to disc problems or spinal stenosis
You need to see a spine surgeon
as early as possible.
Wish you the best and let me know if I can be of further assistance.