DH has the same thing,mit's been nearly a year now. He had a scan and a jab (but I can't remember what it was, probably cortizone?), after which he was great for a few weeks, but the pain came back.
He is waiting for the next thing, for which he will have another scan (waiting for the date) and then probably surgery. Initially he was prescribed Amytriptilene, however it's spelt, but he didn't like the side effects.
Did you know that anti-depressants in low doses are great for nerve pain? I am prescribed a-ds for ms pain (these days I take a lot more too, though).
He is taking
Naproxen, 500mg
Omeprazole, 20mg
Codeine Phosphate, 30mg
Co-dydramol, 500mg
He doesn't take all of them all the time, but varies it depending upon how bad the pain is. The Omeprazole is I think to do with side effects of the Naproxen. I think the main painkiller is the Naproxen; it was recommended to him by one of my ms friends.
I hope you get better pain relief soon. There's nothing quite like constance pain to sap the joy out of everything 