As I read this I too have a headache, and in the back of my mind I have a voice whispering into my head all of the physical sicknesses, or things that could be wrong, and the truth is, if I would just STOP worrying about the headache, chances are....it would go away. Same with you! The constant worry is enough to give anyone a headache, especially hypochondriacs like ourselves. As for the days when you are not anxious.... odds are you probably are still tensing on a subconscious level! Anxiety symptoms are very hard to rid, and usually, speaking from years of anxiety, a few good days, do not fully alleviate months of stress and tension. I would not worry AT ALL about a brain tumor! Best regards!