Hi Doctor, i am male and had oral sex performed on me by a female CSW on 31st July 2011. I ejaculated in her mouth. On the 11th day i tested HIV 1&2 negative through Elisa test. I again re-tested myself for HIV and this time through the HIV Combi Electrochemiluminescense Assay method on the 35th day and the results were non-reactive (negative). I cross checked with the lab and the machine they use is Roche Cobal e411 which tests for determination of HIV 1-p24 antigen and antibodies to HIV 1, including Group O and HIV 2 in human serum & plasma. This test also checked for Australia Antigen (HBsAg) non reactive; anti hepatitis c virus (negative through Rapid spot test) and HBSAG (non reactive through ECL Assay). Physically i feel normal except that mentally i am very scared.After looking at my test results one General Physician (MBBS) doctor said that a negative in HIV Combi test at 35 day period is perfectly safe while another specialist (MBBS, MS Urology) recommended a HIV Duo test. I have read in the net that HIV Combi & HIV Duo are the same thing. Please advice if i should go for another test after the end of 3rd month ie in October end. I am scared as hell.