Facet Joint Injections - Anyone had success?

I have just began a series of facet joint injections for chronic lower back pain, due to arthritis and degenerative spine disease. The injections start off small then they add more medication as we continue. I had the first injection 3 days ago. I was told it could take upto 5 days to start feeling the benefits of the injection. The injections (total 6 in L2-L6) hurt like heck, and I have not felt any change in my chronic pain as of yet which is quite depressing. I was so hopeful. I am told the first injection is with just a small amount of anti-inflammatory med, so it may or may not be sufficient. Has anyone else had these? If so what was your experience with the entire process? I'm just wondering if I should proceed.