Glycerol injection

So, I had the glycerol injection on Aug. 18 and though my pain would be gone by now. But I am still in pain not as bad as before the injection. Dr. is trying to lower my meds, but I’m nervous because the pain is not gone. I don’t want to go back to the same pain level. I’m so disappointed, I really believed this was the answer to my troubles.

Anyone else had this injection? and any advice on what my next step should be?

I had the Glycerol Injection on 18Jul2012 and pain is gone totally. I was suffering for last 5 yrs.