What to do if i had a blood test,,then,,the result for hepatitisbs ag is reactive (low titre),,whats mean by dat?

Hepatitis B: The presence of He B surface antigen may indicate acute or chronic Hep B infection. You need to have a more complete panel, with Hep B core antibody and Hep B surface antibody checked. In chronic infection you would have positive surface antigen and core antibody, but no surface antibody. You would then need further evaluation, with Hep B viral load, e antigen and antibody, and liver enzymes.