Hang in there. At least you have one doctor in your corner. I had a rheumatologist tell me that all my problems were due to fibro (which had been diagnosed 10 years prior). I felt like I had had it and managed it long enough to know that something else was afoot.
He told me I would need to have quarter sized bald spots on my head (I complained of hair loss) and nickel sized sores in my mouth that lasted longer than five days (I had smaller mouth ulcers) for a lupus diagnosis, which is what the previous rheumy had suspected was in the works. He discounted the rather high ANA. Therefore - it can't be lupus. He told me to drop back to 200 mg of Plaquenil daily - which I did (I mean, you know - I was kinda hoping he was right) and in a few short weeks found myself in a major flare.
Now, it may not be lupus - my current rheumy, (an associate of that last one) who is also head of the rheumatology department at a teaching hospital, is leaning toward RA, but is leaving it at UCTD for now. He told me to be sure to stay on 400 mg Plaquenil. He's ordered XRs. He also concedes to fibro as a presence and complicating problem, but is not a singular diagnosis. It's a wait and see, diagnosis in the works, sort of thing. And it's already been over 3 years and I'm on my 3rd rheumy.
I know how frustrated you are and how hard it is to keep looking for the right doctor - but your neurologist is right - meaningless help is just that. Take care of yourself along the way and don't give up.