Tico, I know those pressure points. I found them on my own in high school. I'd make fists and lay on my back with a knuckle of each fist pointed upward on either side of that spine/skull juncture. That way I could relax into the knuckle. Also had a gymnastics coach who would squeeze my skull when I had headaches.
My mom repetedly tells me and everyone else the story about how I came home from college once to find her in bed incapacitated from a headache. I hit her pressure points and she was cured.