Is it anxiety or warning signal?

I had tension in left back region of my head. It was not like ordinary headache which would go away with paracetamol or half hour nap. It felt like strain. Today one hour ago I had very shrill pain on right side of head localised to very small area near lower forehead. While the pain lasted only for one or two minutes. I had never felt anything like this. It felt to me as if someone was stabbing me with pen as pain was only focused on one region. I had my first covishield dose two months ago. I have active lifestyle. But I am very hypochondriac and anxious who has been facing panic attacks since last year. I have no fever or any other physical problem. I don't have history of these headaches although i get ordinary headaches easily when I'm tired. How can I rule out fatal conditions?