Cortisone Acetate and arm muscles

Had Cortisone shot for left shoulder osteoarthritis. Few hours later pain in left arm began. Next day was worse with excruciating pain in arm when arm muscles used even slightly. 48 hours later, pain subsided; but other side effets still present- hot flashes, increased appetitite, sore throat. One week later still having hot flashes, nausea, and now severe muscle spasms in left leg, muscle weakness and palpitations. Sore throat seems worse also- but no sign of cold symptoms.