You might also look to see if they ran an aCL (anticardiolipins) to see if you have APS (antiphospholipid syndrome). It's an autoimmune clotting disorder that could explain your hypercoagulated state.

I don't think there is anything that Sjogren's doesn't attack. I have ganglionitis/ganglioneuropathy from Sjogren's as well as numerous other areas & organs that have been effected. Sjogren's can be far more complex then many (even doctors) realize.

Maybe they will reconsider the IVIG after seeing the results of your nerve/muscle biopsy.

Best of luck with the biopsies. Please keep us posted.