Welcome to the forum. Thanks for your question.
Your worries are over (or should be). The most important information you provide is your negative HIV test result. Well over 90% of infected persons have positive antibody tests by 4 weeks, and all people with HIV symptoms have positive tests by that time. And if your test was a duo test (for both HIV antibody and p24 antigen), the negative result is 100% reliable, with no need for further testing.
Symptoms are the least reliable of all ways to judge whether or not someone has HIV. Even the most typical symptoms of a new HIV infection are almost always due to other common, mostly minor medical conditions -- and in any case, your symptoms aren't typical for HIV. The same is true for exposure history: no matter how high the risk of HIV may have been at the time of exposure, test results always overrule. So even if you knew your partner had HIV, and even if the sex had been unprotected, I would reassure you there is virtually no chance you were infected. And in fact, it is statistically unlikely a partner like yours was infected, and the sex was condom-protected as well.
In other words, testing always overrules exposure history and symptoms, and you can be virtually 100% confident you don't have HIV. If your previous test was a stand-alone antibody test and not a duo, then you can have another at 6-8 weeks to make the result definitive. Contrary to popular belief, it really isn't necessary to wait 3 months -- see the thread below for more discussion on this point.
http://www.medhelp.org/posts/show/1704700
So don't worry about your symptoms. If they continue or you remain concerned, see a doctor about them -- but you can ignore HIV as a possible cause.
I hope this has helped. Best wishes--- HHH, MD