I began to have severe pain in my shoulders & it went into my thighs & left my legs very weak. I have been on predisone for 2 months (40mg) Per day & since the back doctors don't think there are any back problems that could be causing this & I have had MRI's X-Rays, Blood pressure test in my legs, nerve test in my legs, you name it & I've had the test including thousand dollars worth of blood test & no one can find out the cause of the pain but the doctors say I HAVE to get off the predisone. What would be the next logical step to take? I need help!