Have you got a traction unit for home? I really like the one I got, the court is still out on whether it will help or not but I do feel I am better a bit.
I had allllllllllllllllll the injections/treatments. I found that anything they did to my left side caused me to be in pain (like ginnie said for way to long) so that side is not worth doing an injection on. You might find that the other side is better to do the injections on but gosh, I can't say I would recommend any of them. Then again a co-worker had them and her pain went away but I think you know that after the first shot and you seem like your in my category of it doesnt help.
I had the interlaminar (what you had), the transforminal, and a MBB and RFA. The RFA on the right side did make it feel better but it makes in nearly impossible to do excersises to get better on that side, so dont know if that was worth it (the nerves just flat out dont work after the RFA).
Along with starting some medications (maybe trying gaba??) to get the nerves to calm down, you might think about the traction unit, some PT and get ya a spine surgeon in your back pokect in case you want to go that route.
I will be interested in seeing what they tell ya, good luck
joann
PS you might want to get the book “Treat Your Own Neck” by Robin McKenzie