Exercise is indeed vital and I can't encourage you to stay active enough BUT be careful that you don't over do it. It's very important that you alleviate and avoid whatever might be stressing your body. Especially with fibro, finding the right plan to control your symptoms will probably mean finding a delicate balance involving proactive treatments and lifestyle changes. Even though OTC painkillers might help a little bit when you're having a really hard time, they can easily indeed do more harm than good.
And while we can certainly give you some good advice here, a trained specialist can oversee a successful proactive treatment plan and give you the best opportunity to reach a better quality of life.
DX: NDPH, Recovered CRPS
RX: Lamictal, Concerta (Methylphenidate), Clonazepam, Wellbutrin XL, Namenda, Oxycontin, Oxycodone, Melatonin, Magnesium supplements.
PRN: Ketamine nasal spray, Celebrex, Migranal, Haloperidol, Zyprexa, Lodine, Zofran, Phenergan, Thorazine, DHE IM, Droperidol IM, Toradol, Reglan, Ambien CR, Provigil, and all triptans