The Lady's Handbook for her Mysterious Illness. I didn't know your gender! It certainly applies to all but since most autoimmune illnesses afflict females, that is a focus.

In my experience rheumatologists don't got by the level of the ANA and I have read it does not correlate with clinical illness. I had an ANA of 1:5000 something and a rheumatologist claimed healthy people could have that ( Id bout it).

They have checklists of specfic symptoms and you have to check a certain number of boxes.

Is any doctor saying there is nothing wrong with you?

Since treatments are so serious in terms of potential impact, I think doctors wait until they are really sure of need. Plaquenil used to be an exception.. Of course COVID brought Plaquenil risks (hydroxychloroquine) into the limelight.