Thank you for your inquiry. From what we gather from the question, you were asking about the accuracy of the testing you received after taking post-exposure prophylaxis (PEP).
Accessing PEP is a great way to prevent transmission of HIV if the 28-day prescription it is initiated within 72 hours of the exposure, and it is taken consistently and correctly (1). In regards to testing, most HIV specialists agree that the window period for a 4th generation test is 6 weeks post-exposure. In this scenario, that window period would be extended and "reset" to 6 weeks post-PEP completion. Some guidelines and physicians do recommend re-testing 3 months post-exposure (or in this case post-completion of PEP) with a 3rd or 4th generation test for completely conclusive results. Since you have accessed testing outside of the window period you can be rest assured that the results you have received are accurate.
Recommendation: No need for further HIV testing with the scenario provided, refer to a healthcare professional for other health related questions.
AIDS Vancouver Helpline/Online, Marie
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1) Post-Exposure Prophylaxis