Sorry for not seeing your previous questions about Sjogren's.

This autoimmune condition does cause dry mouth & eyes, along with joint pain, fatigue, and many neurological symptoms.

Diagnosing Sjogren's can be difficult. I'd be interested in knowing what 'one test' she was talking about as a possibility. Most doctors look for positive ANA, SSA & SSB as indicators of Sjogren's. However, up to 40% of patients with Sjogren's are sero-negative, meaning their blood work markers are negative...yet they still have the condition. There are other tests, like the schirmer's test to measure tear production, spit test, sialogram (measure saliva flow), salivary scintgraphy (salivary function), and lip biopsy (of the salivary glands). The lip biopsy is about the most definitive test.

You should see a good rheumatologist for a full autoimmune work up.

BTW, there are products for dry mouth. Biotene makes several OTC products. The most common (and effective) Rx is Evoxac. Your dentist, or doctor can prescribe this is your symptoms are profound.