Hi there,
I am also undiagnosed, but have the symptoms of rheumatoid, but negative testing...and when I use the steroids, wow, what a difference! all I can say is relief but when I stop taking them, I rebound and the pain and swelling comes back twice as much
I hope the prednisone will help you, I have finally decided to take it myself, so I think the benefits out weigh the negatives of it for sure, especially when you hurt so much!! Just be sure to take it in early in the day, other wise it will keep you awake! I have taken it for asthma in the past, and I learned that early on.
Feel better.