Next Stage? Anna Witham

I had the cortisone injection a few weeks ago and it was helpful but in the last few days all the night time symptoms have returned even though i have gone back to using the splint. When I saw you last in August you said the condition had worsened and I would need surgery; as I understood it then the injection was for temporary relief. What should I do now? The pain is pretty grim and my GP has prescribed gabapentin. Anna Witham