Understatement of the year symptoms and conditions

Hi! I am a 34 y/o woman that was diagnosed with "Allergic Reaction of Unknown Etiology". I had a red rash that travelled from my legs to my face and back down. The lymph nodes at the base of my hairline on the back of my head were extremely swollen & very painful.
The doc prescribed Prednisone Dose Pack (I have has dose packs in the past, so I didn't think anything of it).

After day 2, I started to see a slight decrease in the rash, but then it started itching.
On day 3, my hands & feet began to swell...and my joints were extremely swollen & PAINFUL!! The cramps started in my feet and hands...thought I was going to die! Oh, and eating everything in sight is the understatement of the year!
Day 4 saw Abdominal Edema and the hands of a Lobster!
Day 5-7: Same ole same ole! Called to see my regular doctor...appointment tomorrow! BUT, after seeing this website, I think I know what is wrong...PREDNISONE!
I will be adding Prednisone to my Allergy List!!!

Hope I never ever see this drug again! I wish all that are on this a SAFE trip!!!