I had multiple pain management injections years ago, that did nothing for my pain. 6 or 7 of 'em. I gave up and lived in pain until someone talked me into going to Cleveland Clinic. With 1 injection, I was pain free for almost 2 years. It then slowly came back, so I had a local PM Dr. do the same xray guided procedure, and it helped very little. So WHERE you go, and the Dr. doing it, made a HUGE difference. It shouldn't, but it does. At this point, my spine is so full of spurs and arthritis, I can't ride like I used to. Even riding in a car for a few hours is painful. I thought my retirement would be nothing but summer m/c trips.....instead, I only ride locally. 100 miles or so is my usual limit. But at least I can still ride, so it could be much worse.
A friend's grandson, just turned 20, and has been in a Cancer unit for 4 months, multiple surgeries, chemo,etc..... it spread like crazy. A really nice, clean cut, very religious kid.......so it has made me realize I've actually been pretty lucky, healthwise.
I hope your surgery results improve. Nerves can be very slow to heal even when pressure is relieved.