Had cortisone shots in both knees yesterday. Get them about every 4 months, have never had side effects before. About 5 hours later, developed persistent headache, not helped by ibuprofen, and b.p. of 188/98. Norm for me is about 128/72. This lasted several hours. Today, still have headache but mild, and b.p. is at 149/83. Should I have been worried with such a high b.p.?