i think i would get a second opinion from another rheumatologist from what you are saying. As far as being discharged by neuro and rheumatologist, that is pretty cold the way they handled it. There are ways to handle things and that wasnt it. The total lack of any human empathy is astounding in these stories we read about here.

If you dont want to find another rheumatologist right now, make a calender mark for yourself to have the GP repeat the blood tests in 6 months or a year or sooner if you get worse. if the results are positive you can get a rheumatologist then. of course this assumes the GP will do it and also takes care of whatever else you need medication wise resulting from your symptoms.