Mineral supplement symptoms and conditions

I was just wondering...I've been weened off Prednisone the last month or so and today is my last pill. YEAH!!!!!!!!!!!!!!!!! AMEN!!!!!!!!!!!!!!!!!!!!!.
However, I've noticed that my joints hurt and my feet oh the pain. Is this normal. I feel like my muscles are weak. walking up a flight of stairs is painful. Anyone know how long this will last or if this is something I will have to live with.