Hi Catra,
Mixed blessing on the MRI. At least there's nothing truly heinous on it.
I had wondered if they might give you a cortisone shot. My husband has had them twice in his shoulder (of course he doesn't have CRPS) for rotator cuff pain. They were helpful both times.
There is sometimes "steroid flare" where people react to crystalization of the steroid and it can feel rotten for a bit, 3 days maybe? I have had multiple of these in my surgical field and can attest to initial discomfort but it always followed with relief. Hopefully yours will kick in soon and calm things down.