Dr. Pelligrino is a medical doctor who has Fibromyalgia. He has written several great articles explaining possible causes, and with good explanations for Fibros to explain how and why it is "real".
This article shows how some people develop chronic pains after a physically traumatic accident. There is more and more evidence: as time goes by more people with chronic pain are telling doctors that they had an accident - but not everyone gets chronic pain after an accident. That might mean there is a type of person, or people with an abnormality, who get chronic pain after an accident - a "Fibro waiting to happen". But thats just my own take on the article.
The website has more info for Fibros. Check out the library articles. Its my favorite Fibro info. site, and I have been doing this for 20 years.