Is my neck and back pain REALLY Fibromyalgia, or is it just muscular-skeletal imbalances? (The Chicken or the Egg type of question) E.g. I have a criss-cross pattern of pain (R-Shoulder, L-Low Back, etc) and visible postural problems: Can this cause neck tightness, leading to tight blood vessels that construct blood flow, and mimic Fibromyalgia? Or is the Fibro happening first in my brain, resulting in tightness and pain at the weakest points?