HBsAg positive means a previous infection or vaccination
HBsAg in presence of anti HBc indicate a previous infection.
HBsAg in absence of anti HBc indicate vaccination aganist hepatitis B
HBsAg usually persists for 3-6 weeks and can persist for upto 5 months.Persistence of HBsAg beyond 6 month indicate chronicity of infection.
therefore,you should check HBsAg level after 6 month of your infection.If it is found positive, then anti viral therapy
may be considered.And if it is negative,you are cleared off infection.