I don't have Fibro, but for the first 10 years or more, it kept coming up, a rheumy misdiagnosed me with it, and that made getting my dx all the more difficult.
How do I know I don't have it? A number of other doctors, including one who specialized in it, explained to me how they knew I didn't have it. When I read about it, it really didn't seem to fit me, at all. When I go on a 6 day pred taper, all my pain problems practically vanish.
So, read all you can on it and see if you see yourself (or not) in the descriptions.
Also, see if you can find a pain clinic or a doctor that specializes in it to get the best treatment you can for it.
I constantly see and read info on cymbalta and lyrica for fibro pain, so i know there are other options besides "distract yourself from it."
Deciding if our pain is from inflammation or other through the blood work is not the best way to do that. My PTs in the past and my chiro now, can feel when things are inflamed. and have taught me the signs of inflammation. For me that's "spongy" tissues and loose rather fluid filled joints (not to the point of visible swelling), but its there and if one learns how to recognize it, one can tell, even if the rheumies can't tell the way the PTs and chiros and physiatrists can. My ESR and CRP are never above borderline, at least not when i've been tested. From everything I've read, CRP and ESR should only be used to see if treatments change our levels (if they start out high especially).
Not saying you do or don't have it. Only saying i've misdx'ed with it, and that can be a common thing for people in pain. So read all you can, seek out specialists in it and/or pain clinic / pain doc. and go from there. there are meds that can be used to control the pain if you have it. That doctors thoughts are just one thought, i'd get a second opinion, on the dx and especially how to go about treating it.
Also things like sleep, exercise, eating right, etc helps all, regardless of the root of the problem.