What Causes Pain In The Joints Despite A Normal CT Scan?

Hi, My name is Geneva. I have been having severe pain for about a week now. I went to the emergency room on Sunday, July 9th,2017. they did 2 series of blood work, an EKG, and a CT Scan. All test came up clean. they didn t know what else to do for me, so they told me to follow up with my PCP within a week, which I did, but they couldn t get me in before the 24th of July. I realized that the pain I m experiencing is in all the pressure points and joint areas that the diagram shows online, such as : the baseline of the head, the neck , shoulders, back, the elbows, etc. My pain is explosive at the base of my head on the left, my neck, shoulder, back, the back of my left arm, and on the right side of my body , it is painful in my shoulder blade, and under my lung. Should I be checked for Fibromyalgia ?