Anyone treated for Bullous Pempigoid?

I developed red itchy raised bumps in different parts of my body. One became a blister, healed and then returned so I saw a dermatologist who has prescribed Prednisone. I am very sensitive to pharmaceutical drugs which I metabolize quickly and get unpleasant side effects. Starting on 20 mg was way too much. Dose was reduced to 10 mg and itching reduced. I finished the short course. Waited a week and got a flu shot. Then was exposed to an emotional shocking situation and itching & bumps spread. Now on 5 days of 10 mg and then reducing to 5 mg. I am concerned about the effect on my Hashimotos, Intersticial cystitis, chronic constipation caused by medical trauma from past childbirth causing tears & nerve damage in rectal wall and now have bladder and uterine prolapses and a rectocele all of which make moving stool out difficult. I also live with chronic pain caused by a dental injury to my jaw joint making it impossible to chew on one side of my mouth. I eat a soft diet of puréed vegetables & other easy to eat foods. Many doctors have damaged me and only a small number have helped. For reference I am 75.