Hi Michelle! Flares are all very different and it is hard to say how long one will last. Taking prednisone is very effective for many of us. Unfortunately, prednisone seems to be the only med that really works for me at slowing down and ending my flares. That is the problem with the prednisone. It is hard to stop using it because it works so well. My rheumy tries to only use the pred on me when I am adjusting to a new medication. I just started Arava last month and am finding it difficult to taper down on the prednisone just yet.
I would think the prednisone is at least worth a try for you, though, as it will most likely help to suppress your immune system so you can get over your flare.
Good luck and my prayers are with you!
Lupus and RA and LOTS of Medications!