My sympathies to all who have to endure the pain of fibromyalgia. Whatever you do, be very careful with massage therapy. There are trigger points that a massage therapist may unknowlingly manipulate that will trigger severe pain episodes. Make sure you inform the practioner (massage therapist or physical therapist) that you have fibromyalgia so they can avoid aggravating your extreme discomfort. And just to be on the safe side, it might be a good idea to turn down well meaning friends who offer back rubs and the sort.
Something that is gaining notice in my area is CranioSacral therapy. I've seen some folks with chronic neck and back pain find extreme relief where nothing has helped before. CranioSacral therapy has also been found to be effective in treating fibromyalgia. Here's a web site that has more information.