The accuracy of an HIV test can depend on various factors, including the type of test used, the timing of the test, and individual factors. In most cases, HIV tests are highly accurate, but there is a window period during which the virus may not be detectable, even if a person is infected.
The window period is the time between potential exposure to the virus and when the test can reliably detect the infection. During this period, HIV antibodies may not have developed to a detectable level, leading to a false-negative result.
For most individuals, HIV antibodies can be detected by standard HIV tests within 4 to 6 weeks after infection. However, some people may take longer to develop detectable levels of antibodies, and in rare cases, it may take up to 3 months (12 weeks) for the antibodies to be present at a level that can be reliably detected by the test.
If you tested at week 8, 9, and 11 (which are within the 12-week window period), and all results were negative, it does not necessarily mean you are HIV-negative. The most reliable way to determine your HIV status is to get tested again after completing the 12-week window period. A 3-month (12-week) test is considered conclusive in most cases.
It's important to speak with a healthcare professional about your concerns, get tested as recommended, and take appropriate steps to protect your health and the health of others. Additionally, using protection during sexual activity and practicing safe behaviors can help reduce the risk of HIV transmission.