What Are The Side Effects Of Cortisone Shot?

I had a cortisone shot in my neck last friday. I felt good for two days but very bad pain on Mon. and Tues. I went to pharmacy to pick up my prescription for pain and took my blood pressure. It was 152 over 92. Yesterday I went back and took it again and it was 157 over 97. I have placed a call to my physician. I am taking Naprocin for pain. I also had a flushed neck Sat. after the shot.