Yes, Ides has geared you in the right direction.
Are the docs going to keep repeating the bloodworks? Sometimes it takes quite a while for things to show up clearly in the blood.
What about any articular changes via XRAYS? Any joint deformity?
At least the docs have a few leads with the sedrate & ANA. That should be checked on regularly.
A negative RF for RA doesn't mean that RA is out of the question...there are a whole set of diagnostic factors that need to be done along with blood.
This is the phase we all hate..not pinpointing exactly what the matter is.
The site Ides gave is great, I hope you find some helpful information.
Do you see a rheumatologist?
take care,
erin