Greetings, sorry about the pain. Details are much appreciated but make it very clear, MRI and x-ray are just a tool to check status of soft tissue inside body but will not show how flexible your body is. Your mother is suffering from flexibility and strength issue at neck and lower back area. Correction of these will solve the problem. Medicines are of no use except
vitamin d plus a good diet is best rather than medicine.
Next Steps
see a physio specialised in trigger point therapy and posture correction and in couple of weeks she will recover 40% and it will take 3-4 months to see full recovery.
Health Tips
if for various reasons you couldn't find solutions let me know will assist you.