Is there a stronger medicine than percocet for treating my fibromyalgia and back pain?

Truly fibromyalgia? It is also important to ensure that you don't have otherwise correctable tendinopathies, vit d deficiency, abnormal postural syndromes, leg length discrepencies, symptomatic spondylosis, unresolved ligament sprains, or hormone deficiencies, etc. These are all exceedingly common yet frequently missed (or misdiagnosed) as "fibromyalgia", yet none will respond well to opiates in the long run.
Yes. There are many medications available for fibromyalgia, including lyrica, savella, (milnacipran) and cymbalta. Opiates like Percocet can make fibromyalgia worse. You also need to stretch and exercise everyday.
Opioids not good. Opioid analgesics like Percocet are really not good options in fibromyalgia as they may make the pain worse as well as create other problems. The mainstay is to exercise and stretch, eat a fibromyalgia diet and consider drugs like cymbalta, savella, (milnacipran) lyrica, topical agents, multimodal stimulation and massage.
Meds are better. Narcotics like Percocet are not recommended for treating fibromyalgia since taking them can result in severe pain (termed "rebound" pain) when they are stopped-resulting in dependency. Also, narcotics typically don't work well for managing fibromyalgia pain. Every fibromyalgia patient is different and the "strongest" medicine will be different for each. Find a provider who will work to find 1 4 u.
No. It is generally accepted that narcotic analgesics are not wise to use to treat fibromyalgia. There is no "stronger than", "better than", as pain treatment should be highly individualized. You would need a comprehensive evaluation by your pcp or pain management physician.
Yes and No. There is a diversity of opinion whether or not opioids like Percocet or morphine-like drugs help fms because not all fms patients respond favorably to them. There are a number of new treatments including the snri drugs like Cymbalta and savella (milnacipran) that seem to help patients. Also another class of drugs like Lyrica either alone or in combination with the snri's and opioids seems to work favorably, too.