Thanx for asking you query.
Well you didnt mention your age when you had stroke because young age stroke can be a manifestation of connective tissue
disorders You didnt give an account of which antibodies
you are positive and on which grounds your diagnosis was made of sjogrens syndrome . Sudden fall in Hb can be due to autoimmune hemolytic anaemia
but you didnt mention whether after starting steroids
it showed an improvement and by how much .If you suffer from sjogrens syndrome as you have mentioned then disease activity should be evaluated at earliest by ESR , CRP, Schirmers test and other relevant investigation as desired by your treating doctor. Losing weight even being on steroids for the autoimmune disorder , indicates that you need an expert advise and detailed investigations at the earliest .Kindly dont ignore the issue and seek medical help
Get well soon .