I tested for HIV twice (2nd and 3rd) generation almost 8 weeks (52 days) after possible exposure, and both came negative. But I’m feeling some symptoms (some low fever, below 37,5C/98,5F; and two swollen lymph nodes in the neck and one in the groin; diarrhea). I tested after started feeling the symptoms at about 7 weeks, and both came negative. One of the tests said that its window period was 6 weeks. Is this a conclusive result?