Are combo HIV test results reliable for a patient who has had recent HIV exposure?

Hello doctor,

I got a massage from a female four years ago. When she sat on my thighs, I felt a sharp pain for a few seconds, but when she got off, I did not have any pain. I am 99 % certain that this is not a needle prick. Why would a therapist try to infect me by sitting on my thighs with a needle in his pocket? I have not seen any blood, but as we know, 45 days are conclusive for a combo test for any exposure, and my test is on the 52nd day. So am I completely safe regarding this exposure, whether there is blood or not? I have undergone the HIV (Human Immunodeficiency Virus) test in a laboratory. Are their results reliable?

Thank you doctor for the reply,

Do laboratory error occurs? It has been more than a year. I do not know why am I concerned, but I suspect the authenticity of the result. Am I wrong?

Thank you doctor for the reply,

How soon can clinicians rule out infection? As per the study, laboratory testing using antigen or antibody detects HIV infection sooner than other available tests that detect only antibodies. Suppose a person gets a laboratory-based antigen or antibody test 45 days after a possible HIV exposure, and the result is negative. In that case, follow-up testing can begin 45 days after the possible exposure. If somehow the message therapist wants to infect me with a needle in her pocket, can I conclude that I am HIV-free irrespective of the risk at the time of exposure?

Thank you doctor for the reply,

If I have any high risk of exposure and my test comes negative, do I need to undergo the test again? I mean single test after the window period is enough.