Get a disability attorney (they only get paid if you win your case and they can only take so much).
Even before I fought for disability, when I was just fighting for diagnosis and treatment, I dealt with doctors who weren't listening to me. I was willing to consider depression (by the way, you can be on disability for depression), but I wasn't willing to have a doctor who wasn't listening to me, especially when treatment wasn't working.
I too had doctors who said fibromyalgia didn't exist, or that fibromyalgia is "always" a symptom of depression. They were full of poop. It took me a couple years and a moving into a new state, to find a doctor knowledgeable in fibromyalgia (a neurologist, very smart guy. He taught me a lot. And he did more than just believe me, he helped me find treatments that were actually helpful).
I know it's very hard, especially when you can't get doctor's to understand or believe you, but you do deserve a second opinion and a doctor willing to work with you.
Maybe despression is your primary issue. Maybe it isn't. Have you been prescribed Lyrica or Cimbalta - both are used for depression-pain and fibromyalgia-pain, and other pain as well. If they work, it doesn't matter what the "cause" of your symptoms are.
I'm not taking either Lyrical or Cimbalta. My husband was prescribed them (for the pain of diabetic neuropathy), and he couldn't take them because of side effects (and the one worked great but was so expensive that he was willing to take the medication he'd been on that didn't work as well).
I'm not taking them because of the price and the fact that I've been very hesitant to change my drug regimen, because it's working fairly well for me. For the fibromyalgia, I'm on amitriptyline (an old antidpressant), and cyclobenzaprine (a muscle relaxant) at bedtime to help me get deeper sleep and tramadol for pain.
The sleep study was vital, because it showed that I was spending virtually no time in deep, restorative sleep (which is why the sleep meds are so important). Sleep deprivation is my biggest trigger, second is drastic weather change (we suspect barometric pressure, temperature, and moisture to be the biggest factors Even sudden "improvements" in weather can cause a flare).
I strongly recommend a health journal, so you can find your own triggers.
A good one is HEALTHMINDER Personal Wellness Journal (a.k.a MemoryMinder Personal Health Journal) Health Diary and Symptoms Log [Spiral-bound]
F. E. Wilkins
Look inside the book at amazon.com
http://www.amazon.com/HEALTHMINDER-P...9381450&sr=8-1
You can buy the book or you can look inside and create something similar yourself.
It helps doctors see what you're experiencing, and even more importantly it helps you find patterns so that you can better treat or prevent flares.
Also check for fibromyalgia and chronic fatigue support groups in your area (they're considered overlap diseases, so even if you don't fit the cfids criteria, the support group will be helpful because you'll find people with symptoms of both going to the support groups. You'll learn a lot of helpful tips and you'll learn which doctors in your area are familiar with fibromyalgia and other pain and/or fatigue disorders.
Yes depression often is a cause of pain, but it doesn't really matter where your pain is coming from, you need to have it treated.