Hello, I have been experiencing these really quick headaches on the left side of my head right above and behind my ear. It is a sudden pain that lasts for 5-10 seconds. It is not the worst pain that I have felt it is probably only a 1 out of 10 but I am just worried because I have never had these before today. Could this be due to stress? I was very stressed yesterday because of an interview. I would appreciate any help?