Welcome to Neuro Talk. Sorry for what brought you here, but you will find support and a few friends too. Leesa is the best for reading the MRI.
Before you do another round of steroid injections, make sure that is what you really want. If they don't work the first time, they are most likely not going to work a second time. In your situation, maybe get another opinion, with someone other than the one who did your surgery last time. This is the one thing that I did not do, get another opinion, and I wished I had.
I reversed the curve of my spine, and am fused C3-7. There are issues, called the dominio effect. You need to ask your physician (all of them) the risk to the verterbre above and below the proposed surgical site. Sometimes due to the lack of strength in damaged verterbre, the hardware, and such do not hold up, and this leads to more and more surgery. I don't want to frighten, but inform you that doctors do not on a regular basis address this most important issue. Also those shots cost the insurance company a huge amount of money. there are other injections to try, that may have more benefit to you. I had Ketamine infusions, which did help until I got to surgery. Steriod injections didn'd do sqat for me either. I will be here to listen any time. More of us with back issues will answer you. When I came to NT, I was a mess, and it was leesa who read my MRI and help to inform me of what I was really facing. She is excelent in this regard. I will keep you in my thoughts and prayers. ginnie