Suggest Treatment For Severe Headache

I HAVE A HISTORY OF TENSION HEADACHS. CHRONICALLY. RECENTLY EVERYTIME I GET STRESSED I FEEL PRESSURE IN MY TEMPLES TO THE POINT ITS LIKE A BRAIN FREEZE WITH OUT THE FREEZE.

IF I GET THE LEAST BIT OF STRESS WHICH IS NORMAL FOR ME.. I GET THE PAIN.. SHOULD I BE WORRIED?? IOVE HAD LOTS OF TEST DONE IN THE PAST AND NOTHING SHOWED.