I know this is late and I hope you got an answer to why your ANA was elevated. I have Sjogrens and I suspect Sjogrens started right after I had my last child. I’m sure I’ve had POTS since childhood as I remember fainting and blacking out as I stood from sitting. However I also have Ehlers Danlos and MCAS which all seem to run together.
As for Sjogrens, my last child is now 19, I had joint pain and dry eyes, and the the dry mouth came on. I have mild Sjogrens which I’m guessing means it hasn’t yet affected any organs. I’m glad to hear you are getting diagnosed so soon. It took me 10 years for Drs and dentists to put two and two together. This means awareness is better!