wife went the injection treatment, didn't work 
next partial discectomy, didn't work 
next double fusion l4, l5 and l5 s1    
she still has back pain and predict weather with great accuracy.   
     Our experiences option 1 see if someone will install artificial discs, absolute  best option   
                           If you do the double fusion, use cadaver bones , the pain from removing the bone and healing time is worse than the double fusion.   
good luck to you.   
oh she had an artificial disc c4 c5 , awesome!!!