It has just occurred to me that, with Fibro having so many symptoms, how do you tell when you are otherwise ill? The chest pain that I suffer with is on the right side, but yesterday, I was struck down with pain from the left side of my chest. I lay down, and waited for it to pass. However, I just wondered, what if that wasn't Fibro? I would have ignored a sign of illness. Has anybody else considered this and how do you tell the difference?