Hello @andrewcord, Welcome to Connect. I'm sorry to hear you haven't had any sleep for 4 days. That can be pretty awful in itself not to mention other complications you are having. Normally you have to taper off of prednisone very slowly to avoid withdrawal symptoms. Mayo Clinic has some information on the topic here:
-- Prednisone withdrawal: Why do I need to slowly taper down the dosage?
https://www.mayoclinic.org/prednisone-withdrawal/expert-answers/faq-20057923.
This is something you really should discuss with your doctor as soon as possible. How much prednisone were you on over the 12 day period? Did you take the same amount for all 12 days?