You've been suffering with anxiety/panic for many years now so it doesn't surprise me that you've developed chronic pain. The body can only tolerate so much before mental illness manifests physically - usually as pain.
If your doc suspects fibromyalgia, you should ideally be referred to a pain clinic so you can be treated with meds to control symptoms. There are also non-med options which might suit you better.
No point suffering in silence anymore, pb.