Having terrible pain in my scalp. Has not relented in over 8 weeks. I can t sleep....it hurts to lay on my pillow. If my scalp is touched on the right side, a few inches above the ear, kind of over the right eye, it feels like a knife stabbing me. And there is constant pain, though not as bad, even when scalp is not touched, along with light sensitivity and low back pain, with pins in needles in arms and legs at times. Any ideas?