Mechanical problems are like making the joints work, not nerve damage. But anyway -- since you have nerve damage and it will probably progress it probably is best that you have surgery but I'M NO DOCTOR.
Just so you realize that it may not relieve your pain -- that's good.
And if you decide to have the surgery, do NOT have the ESI. There would be no need for it, and besides they're dangerous. Steroids are not good for the body either. So if you decide to have surgery, cancel the ESI.
Surgery probably is your best bet at this point. I wish you the very best. Let us know how you come out, okay? God bless. Hugs, Lee