hallo dear friend ,thanks for writing to HCM
i hv studied your case
see fusion of of L 5 [ sacralization of
lumbar vertebrae ] is finding on
X ray and it may not be related to your accident , it may be present since long time
so fusion of l5 is not cause of your pain
MRI SPINE done? you should do that
see wheather any disc compression
you need some neurotropics like
pregabalin with methylcobalamine
and calcium suppliment with vit D
take rest , take some
analgesic , hot or
cold fomentation
avoid lifting weights
sit with taking support to your back
continue spine strenghthening exersizes
in younger age group we can go for decompression surgery if disc is large
hope this information will help you
for further details you can contact me on drvaibhavg@yahoo.com