Welcome to our Forum. Before I address your specific questions I have a summary of your situation and then a comment.
Summary. You had receptive oral sex with another man of unknown status and 8 days later had a fever, sore throat and flu-like symptoms. You are worried that this might be HIV seroconversion. You really do not need to worry. As you know from looking at earlier posts, the quoted figure for HIV risk, if one has oral sex with an infected partner is less than 1 in 10,000 and, in my estimation that is too high. Some experts state there is no risk at all from oral sex. Neither of us on this site have ever seen or reading the medical literature of a convincing instance in which HIV was passed by oral sex. Thus your illness 9 days later was coincidence, not ARS.
Now for my comment. I congratulate you for asking your partner about his health and status. As you tell us of his responses however, I find myself wondering why you then went on to have unprotected sex with him is his questions suggested that he might be a risky partner? Asking these questions works best when you act on the information gathers.
Now, on to your questions:
1. No. See above. The symptoms of the ARS are TOTALLY non-specific and when people experience "ARS symptoms" they are much more likely to have something else, usually some other, more typical virus infection. When this has been studied in the US, less than 1% of persons seeking medical care for "ARS symptoms" are found to have HIV, the remainder having symptoms due to other processes. In contrast, over a given year, there is almost no one who has not had a viral illness, night sweats or both (sometimes on multiple occasions). For you to try to judge their HIV risk based on "ARS symptoms" is a waste of time, particularly after what was essentially a no risk situation.
2. It is possible but not for you given the information you provided.
3. Not usually.
4. A normal hemogram means nothing.
I hope these comments are helpful to you. You really have nothing to worry about. EWH
Thank you doctor for your answer. :)
It's nice to hear that. I will be more responsable.