Hi Welthy,
Love your pic... thanks for sharing it with us. As for your question about prednisone and withdrawl... First of all, there are so many possible causes for his symptoms and only a doctor can answer those questions, but I will tell you that my husband was on steroid therapy of all kinds during his treatment and yes there are definite withdrawl symptoms. Steroids oftentimes give a person a false sense of wellbeing , but when they are discontinued there is a mental and physical withdrawl period. You didn't state whether he was on step down or not , which is usually the way, but even with that it does take a few days or maybe more than a few days for the body to adjust. When Mike was on steroids, he was totally mentally and physically wired and going off of them had the total opposite affect. It's a big adjustment for the body.
My advice, is to insist on seeing the doctor especially due to the fact that there may be other issues involved. I do feel your frustration and will keep you in my prayers. Hope things improve soon.
Sue