Sex worker had oral sex with me only she had oral I am not after 12 week I check hiv form ICTC report are negative after 3.5 months again check form lab results are non-reactive after 4.5 months again I checked hiv antibodies p24combo (CMIA) results are non-reactive 0.2 after 5 months I again check elisa serum results are negative and the final test 6 months 180 days I checked ICTC results are non-reactive can I sure I don't have hiv need a future test this test conform?