I am a 23-year-old male who had unprotected vaginal intercourse with three different females three weeks ago. I later asked their status, and they told me they were negative. Five days ago, after I suspected I might be HIV positive, I started having a dry cough which occurred after almost five minutes. And I am having a severe frontal headache which at times makes it hard for me to think. I went to a test last week, but the test came negative. Other than that, I am fine with no night sweats, fever, rash, or anything of some sort. Are the symptoms I am having indicate HIV?