Since childhood, I’ve had headaches.  I’ve never seen a doctor to find out what “type” they are (tension, cluster, Migraine).  Each time they invade me (I feel it IS an invasion) they typically start on both sides of the back of my head.  Gradually the muscles on the back of my neck and between my shoulder blades tighten.  Throbbing turns into pain, disabling me for the remainder of the day.  I begin to have a strong sensitivity to light and loud noises. I spend the rest of my day...