I am experiencing sudden, brief flashes of moderately intense pain in my head. It does not seem connected to any particular activity like a sneeze, cough or physical exertion. Quick flash of pain lasting a second, and then gone. Beginning 2 days ago, this has happened several times, perhaps 5 or 6 times, over the course of the day. I had my annual checkup with my primary care doctor this week, and blood work came back in all normal ranges. Yesterday, blood pressure was 122/73.