Have been in exactly the same situation - very, very long story which I won't bore you with - the out come was, after the injection (which didn't help) it was suggested I had physio - I suggested back lets find out what the problem is first - x rays and mri scan has shown up I need an op - my GP is brilliant - asked me where I'd like to go for it - got booked in almost immediately (a centre of excellence for orthoepedic (?sp) surgery) have had another mri there, a check up and am due for op tomorrow. No amount of physio would have cured it. I did a it of research myself, discussed my treatment with my GP and am very happy with the result.