What Causes Burning Sensation In Body While Taking Prednisone And Benadryl?

I was placed on Prednisone in March of 2013 after having an allergic reaction to Bactrim that I was taking for complications to the flu that resulted in Pneumonia. I was initially given an IM injections of Prednisone and Benadryl for the allergic reaction and placed on Prednisone 60mg PO for a 10 days. After the first day, I began to feel burning sensations to several areas of my body. The most affected areas were my face, hands, feet, back of my neck, and inner thighs. The insides of my body felt on fire and when I urinated, it felt like my urine was extremely hot. I am still having these sensations as well as skin rashes that suddenly occur for no reason. I have felt fatigue and unwell since this all started. I have developed allergies to things that I was never allergic to before. My cortisol level is now below normal, I was been having near syncopal epidsodes, hypotension, hypokalemia, neuropathies, and the list goes on and on. Will this resolve? Did the Prednisone affect my adrenal cortex? If so, is this reversible? Please help.