I have been having a headache for a few days now. It is behind my right eye and goes along the right side of my head, concentrating behind my ear. When I rubbed behind my right ear, I noticed that there appears to be a lump or the bone is larger on that side than on my left. Also when I rub behind my right ear, it is sensitive, and sometimes it causes the headache to get worse, or afterwards I feel chills. Should I be concerned?