One would think yes... the tests should show.

My sed rate has been over 25 for my whole adult life.

Rheumatoid factor and Lupus may give false negative.
I've had those tests twice. Negative each time.

I'd start looking at your soaps, bedding, daily activities that expose you to suspicious chemicals. Sometimes it is a weird thing... like feathers in your bedding/pillows. Or the fabric softeners you use.
Double rinse your clothes, to remove all soap residues and don't use fabric softeners.

You really have to become a detective... looking at everything.
Even the potential of toxic black mold hidden in your house?
Now that the obvious things are being eliminated, the more rare things have to be ferreted out.