Since I am getting routinely tested for HIV while on PrEP, should I be worried about the testing “window period” when I get my HIV test results? How confident can I be in my HIV test results?

If you are using PrEP consistently on a daily basis, then you should be fairly confident in your HIV test results, and using a rapid HIV antibody test should be fine.
If you are not using PrEP consistently on a daily basis and worried that you might be seroconverting, then using an RNA test might be more reliable in case you are in the “window period” in early HIV infection.

If you want to learn more about specific window periods for the different types of HIV tests, click here.