Hi Moggy and welcome to HW and the RA forum
The other way of testing for RA are scans and xrays but if your Rheumy is certain from your symptoms alone I guess thats confirmation enough.
Isnt prednisone great its a shame we cant stay on it long term.
I havent used Plaquenil, I hope someone comes along to ease your mind about taking it. Im all for taking anything that will give me quality of life.
Please keep posting on how you are going, there are some very knowlegable and compassionate people on here who are only to willing to help.