I am a white American heterosexual male in my mid 40s and recently had an unprotected vaginal exposure with a white American heterosexual female former co-worker in her late 40s. I tested negative for chlamydia, gonorrhea, syphilis, hepatitis B, and HIV at 27 days post-exposure. Based on what I have googled, I have had none of the “typical” symptoms of any STD or HIV (fever, sore throat, flu-like other). I also had a candid talk with the female post-event, and she noted that she isn’t promiscuous, although I don’t think that she has had a recent HIV test.
I was non-reactive on the combo (antigen/antibody) test at 27 days. I realize that is one day short of the 28-day guideline, but for all intensive purposes, should I feel assured that I am HIV negative?