Naproxen, like all NSAIDS, can cause bleeding. Celebrex, Advil all the same. If taken with food, a must, or Tagamet, less chance of bleeding. But if it is fibro probably won't help. Omega 3 and D3 good antiinflammatories and might help. My fibro is more of a deep burning pain, rather than muscle spasm feeling. It won't show on scans or even bloods, except maybe inflammatory indicators. Not sure, but a rheumatologist would be a very good choice. Why do doctors have the gall to think we want to see them out of anything but real pain. What a lack of compassion.
I'm so sorry you are having this CB and I imagine it is set off by your stress, but it is physical!!