HI Vickie,
No there is no known relationship genetically or otherwise among these three diagnoses. And, no, fibromyalgia is not an autoimmune disease. It is a chronic pain syndrome primarily affecting the bones, joints and muscles. It is thought to be due, at least in part, to defective pathways to inhibit pain. So, pain is activated normally but it doesn’t stop because the inhibitory pathways aren’t active enough.

