I'm not well at the moment - hot and shivery, like a fever, and some chest pain. Went to GP (Already had the appointment for something else but was worried about chest pain) and after an ECG was given the all clear. However, I've now developed a blinding headache so bad I can't turn my head - except after taking painkillers it's gone. Is this something to worry about? Or will it not be serious if painkillers can get rid of it temporarily? As surely if it was really bad painkillers wouldn't touch it, right? Should I call 111?