The best advice I can suggest is that you call your neurologist's office to ensure that they send their office notes back to your primary care doctor so he or she knows what's going on and schedule a follow-up with them for further discussion of the potential diagnosis. I would advise that you not take two cymbalta daily until you see your primary doctor, if you're taking it just stick to one per day.
I don't know why the neuro would say it's fibro because testing came back normal....as the tests would be normal with anxiety. Did he do a physical exam specifically for fibro? There is a "tender points" test where they press specific points on the body and having multiple tender spots supports the diagnosis.
Certainly fibro is a potential diagnosis that could include some of the symptoms you describe, but there is also very clear body tenderness which is made worse with fatigue and other factors, and generally the tenderness has to cover both sides of the body as well as above and below the waist.
It's good that fibromyalgia is being recongized more lately but I think there may be a tendency to use it as a wastebasket diagnosis so to speak. The good news is that Cymbalta is indicated for anxiety as well as fibromyalgia so whether or not you have fibro, the treatment may still be on target for you. But I think seeing your doctor back to further evaluate the possible fibro diagnosis would be beneficial for you. Best of luck!