I think people are trying to tell you that worrying about what would interact with an HIV test is a bit pointless in your particular situation because you don't need to test. People get HIV from having unprotected vaginal or anal intercourse or sharing IV drug needles. Your activity was no risk and a test isn't necessary because you won't get HIV from that.
Things that might interfere with an HIV test, to answer your question, would be things like chemotherapy or anti rejection drugs if you had an organ transplant.
Don't write in capitals again, because it is super annoying to read.
What was your risk, anal, vaginal or oral and did you use a condom?