I have had SS since 1992, starting with a severe peripheral nephropathy (so-called Neuro-Sjögrens Syndrome).
Just prior to this owing to severe symptoms, I was diagnosed as Polyarteritis (another auto-immune disease).
This was incorrect.
My Labs showed a CPK of over 2500 units, but this was not specifically diagnostic to the Rheumatologists. A terrible mistake.
I did not get a diagnosis until much later (1998-2001). I was being seen at a University Clinic for years without a diagnosis, even though I saw several Rheumatologists (academic).
No diagnosis was ever made until a relative mentioned that I could have this condition. My daughter's research also pointed to this. All my laboratory tests were constantly negative.
Finally, I became very ill in 2001, and all my tests turned positive:
ANA, Rheumatoid factor, ESR high, a low number of white blood cells (leucopenia), C-Reactive Protein (CRP), positive monoclonal immunoglobulin proteins, and clinical signs of Sjögrens:
Extreme fatigue, dry eyes & dry mouth, difficulty chewing and swallowing, decreased sense of taste and smell, joint pain, and swollen glands.
SS-A (Ro) and SS-B (La) antibodies were never positive.
In 2001, my Creatinine phosphokinase started increasing again, and I experienced severe muscular pain & wasting.
I was therefore diagnosed as having Polymyositis, on top of the Sjögrens Syndrome. I was started on high doses of Prednisone, and later Cellcept.
Finally, after 5 years of requests by me, I was granted to receive IVIG.
This poor performance by Rheumatologists and other Physicians still leaves me astonished. I have improved by about 50% due to the IVIG.
As to the possible precipitating factors, I can suspect two episodes of Mononucleosis. But the main factor I think was my extremely stressful job, with lack of sleep and 50-75 hour work week.
My spouse was severely ill with a Borderline type Personality Disorder. This meant that my life was extremely abusive and stressful. I consider this a major factor in my illness.
I have shortened this story considerably.
Best wishes to all.