Thank you for your inquiry. From what we gather from the question, you were asking about the tests you received after accessing post-exposure prophylaxis (PEP).
PEP, if accessed within 72 hours of an exposure and used consistently and correctly, is a very effective way to try and prevent an HIV transmission (1). The information provided by your doctors is correct, the window period of an HIV test is extended if you access PEP. Without PEP, the window period for a 3rd generation HIV antibody test is 12 weeks post-exposure. If you do access PEP, the window period "resets" to 12 weeks post-completion of a 28 day PEP prescription.
Since you have accessed testing more than 12 weeks post-PEP completion you can be rest assured that your negative results 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
If you are satisfied with the Helpline service, please consider Donating.
1) Post-Exposure Prophylaxis