Welcome to the forum. FYI -- and for other users who may read this -- it is only by chance that I am answering your question. Dr. Hook and I take questions randomly, without regard to requests for one of us or the other. Our views, opinion, and advice are always virtually identical, even if our wording and styles differ from one another.
You had an exposure that could not have resulted in HIV transmission -- condoms work and oral sex is no risk, or such low risk it can be ignored. But most important, a universal and frequently repeated theme on this forum is that as long as HIV testing is done sufficiently long after exposure, the test results always overrule all other factors -- symptoms, exposure history, etc. And 6 weeks is indeed enough time. In other words, your test results prove you did not catch HIV and that your symptoms are due to something else.
1) Risk assessment: Zero for practical purposes -- but irrelevant, given your test result.
2) No, your symptoms do not sound like those of HIV/AIDS. But it wouldn't matter if they did -- again, because of the test result.
3) Your symptoms are extremely common, and of course I have had patients with such symptoms. But none in whom HIV was the cause.
4) 100% reliable. See this thread (read it all, including follow-up comments): http://www.medhelp.org/posts/HIV-Prevention/-A-Question-on-Testing/show/1347755
5) No, I have not see any HIV infected persons with such symptoms.
6) You don't need any further testing. However, as you will see in the link above, many agencies still recommend testing at 3 months -- so you might consider it for additional reassurance. If you do, you can be sure the result will remain negative.
If you have another test, feel free to return with a comment to report the result. Other than that, however, there is no point in further discussion. There is no information you can provide, or scenarios your anxious mind can think up, that would change my opinion or advice.
It may be that you are hyper-anxious about HIV because you know that infections are more common in African Americans than other race/ethnicity groups. That is true. However, it does not mean that all blacks are at high risk. Here are 2 past threads that discuss these aspects:
Bottom line: You don't have HIV and shouldn't be worried about it. If your symptoms continue or you otherwise remain concerned, see a doctor or clinic to work it out.
Regards-- HHH, MD