My risky exposure is on March 19 to its almost 90 days over I have done 4 th gen test at 38 day and 40 th day negative 55 th RNA PCR qualitative test negative 60 th day tridot Rna pcr at 63 day and full std panel including 18 test all negative negative 83 day 4 th gen negative rapid negative 84 th day i had visited dermatologist he concluded me that I have canchriod mixed infection My qn is how are my chances of getting hiv am I conclusively negative for hiv and other std ?