It would be best if you have all of the tests done in order to rule out all of the other problems or disorders that you may have.
Don't just jump to the conclusion that you have Fibro.
Most often, the formal diagnosis doesn't come until everything else it could be is ruled out.
Maryw, your description suggests possible migraine. Migraine can be confused with sinus pain, and pain in the neck and shoulders can be part of a migraine, too, and they can occur as you describe. Migraine is a comorbidity of fibromyalgia. Keeping a record of the pain type, other symptoms, frequency, what you do that helps or doesn’t, will help your doctor determine what type of headache you may have. Migraine.com might be a help to you, too.
I hope you feel better soon!