i was recently diag. with lupus and i have been getting mouth sores for about 6months now. to be diag. with lupus you need to have 4 out of the 11 criteria. one of the crit. is oral ulcers in the mouth or nose, usually painless is what the brochure i am reading from says (brochure from lupus foundation of america) there is alot of good info including the criteria at www.lupus.org
do you have other symptoms. i had my blood work done at least 4 times before everything starting showing up.
maybe you should have your blood work done again if its been awhile.
lots of luck