PEP treatment. HIV DNA DETECTIVE TEST.

Recently one worst situation happend to me. when i came to room from office as on 13.02.2020 one of my friend bring a prostitute to room. i unknowingly went the room and when i removed my shirt for dress change that girl came my side (as my friend instructions)  and hugged to me with topless. for that movemet i too hugged her for few minutes( with topless) after that she tried to remove her pant. then i shuddently threw away that girl from my side. when i tried to kick out to that girl my fingures are touched her vagina surface. after that event 14 feb i consulta  doctor and i taken pep within 24 hours of that event.. and i requested to doctor regarding test. he suggested me for hiv dna detective test.. he said it will give accurate results after 72 hours of exposure..i given blood sample after 90 hours of probable exposure and report came as not detected. what extent can I rely on that report.. from that day i am sleepless and am very depreced without my fault. pls help me