GM, I too have Sjogren's as a result of an infection late 2018. I'm seronegative and had a neurological presentation first with dryness later so getting diagnosed was a challenge. Finally was able to get to Mayo and they recognized my symptoms and did testing which other docs would not because of my seronegative status. So had positive lip biopsy, positive tilt table, positive punch biopsy for small fiber neuropathy, and the list goes no. It is a difficult disease to live with at least for me. Getting to a major medical center is my best advice for someone having difficulty getting diagnosed. Just wanted to introduce myself and say hello:)