First of all, welcome to the forum.
The pain could be related to fibro, or it could be not. Really hard to tell. Did you get an Xray/MRI done? You should as soon as possible.
I had severe neck pain in all the years that I also had fibromyalgia but was not diagnosed with fibro. Both were put down to Repetitive Strain Injury (RSI) and my sensitive perfectionist personality. I'd get physical therapy and OTC pain medication. Years later, I was so fed up with the pain that I went to a private hospital and had an MRI done. And yes, 2 herniated discs, pretty severe and had to be operated on (most likely due to 2 accidents I had had in my teens). The loss of feeling/power in my right arm, which many doctors also dismissed as RSI for more than a decade, had thus a real cause.
But the 2 surgeries I had made everything worse - the pain is very sharp and the headaches are endless. Now they blame fibromyalgia .... whatever it is to blame, listen real well to your body. Eat well, live well, exercise, do basic stretching/yoga moves, moves you learned from the physical therapists, avoid stress, do things you love doing as much as possible etc. Sadly this is often the only option we have. It can be blamed on an illness, but the treatment is almost always the same. Which also includes pain meds by the way, but keep that option as your last.
All the best!