I have a positive ana. what does that mean?

Could mean anything: Positive ANA is a screening test. It is often done to assess for connective tissue disease but there is a high false positive rate. The titer( ie level) of the result along with the pattern can provide more accuracy but often the lab reports only "+" or "-" which is useless. If the patient has significant symptoms compatible with a connective tissue disease, then the ANA more likely to be valid.