I had a kidney removed due to cancer and was told that it was rem...

I had a kidney removed due to cancer and was told that it was removed in time before spreading. Now, after experiencing fatigue, it turns out I have some type of Addison's disease (low aldosterone). The doctor told me it may have been caused by the trauma of the surgery when they removed the adrenal gland from the top of the diseased kidney. I am now on Prednisone 180 mg for three days and then weaning off by day nine. I have a pounding heartbeat and can't seem to contain my tears. Has anyone else heard of this type of reaction following nephrectomy? Is this a high dose of Prednisone? I weigh 160lbs. P