Sir I hv infected with one unknown woman during my penis touch her anal part I feel burning sensation that time after 18 days I test hiv 1 and hiv 2 antibody screen test it's show negative after on 45 th day I again test at all path lab std panel test hiv combo test hiv 1 and hiv 2 with antigen test it's non reactive after on 64 I test again at irctc center it's non reactive again it's conclusive or no need to test again pls help me.