What to do if i'm feeling like i might have fibromyalgia?

Get check for: ailments like Lyme disease, Chiari malformation, etc. FMS is a diagnosis of exclusion IMHO. There is usually a cause.

Rheumatologist: Middle age person suspicious of fibromyalgia might have consultation with a Rheumatologist because these specialists usually have greatest insight about and experience with this disorder. First, make sure the doctor believes in reality of the problem; some do not.

Fibromyalgia: Have a full workup from your general care practitioner to determine if fibromyalgia is the correct diagnosis. If so, pain management, preferably with as few pills as possible is of utmost importance. Here is the website of the American Academy of Pain Management: http://www.aapainmanage.org/