Greetings, sorry about the pain. Your back is due to loss of hip flexibility and nothing to do with spinal cord and don't warrant x ray or scan. If you have long sitting hours you probably have every chance of increasing back pain which is due to poor abdominal strength. As a home program do hamstring stretch. Also ice the area twice a day.
Next Steps
get to see a physio near you who has knowledge about trigger point therapy and exercise program to strength your abs. your pain should be 40% relieved in 3 sessions and next 60% pain should be relieved in next couple of weeks.
Health Tips
if any questions do let me know