I had a condom failure in 26th December 2017 during insertive vaginal sex with a CSW. I took a antibody test from a private lab in india ( Dr. Lal pathlabs) on 5th August 2018. The test was " Flow thorugh Immunoofiltration" and the result was negetive . Can I be assured that I did not contact HIV from the epidode ? I am concerned that the private lab may have given an false negetive result to get rid of the legal issues ( they have to counsel for positive result as per the law) . Please help.