I think you might want to contact the National Organization of Rare Disorders (NORD). Fibromyalgia comes in many forms but what you describe  - painful episodes that cause your body to swell, which paralyzes your muscles, causes bruises and your fingers to turn purple - is, at least to my knowledge, fairly unusual in FM. It makes me wonder if you could have something else, perhaps related to FM, which your doctors have not identified. 

If you go to this page you can find a number you can call to tell them your symptoms and they can tell you if they match up with any other known disorders. It may very well be that you have FM but its good to at least check this option out. Good luck!