Hi Sorry to hear that ive had a few steroid injections into my shoulder and some helped and others didn't guess it just depends on the flare, there are tests whole body bone scan being one of them that shows RA or more inflammation -hot spots, but really its all how you feel
how much prednisone are you on sometimes it takes a while to 'kick in' and I guess how long have you had RA
i'm currently (hopefully) coming off a bad flare and my right arm is still not good sometimes over the years ive had a flare and say a foot or hand has been bad then it gets better but then other times it never dose and stays like that but this again depends on the person
call your local Doctor tell them its unchanged maby you need a bit more prednisone right now
good Luck try too keep positive