Welcome to the forum.
First, it is statistically unlikely yor partner has HIV. Second, you had condom-protected sex, so even if she has HIV, you were at little or no risk. Third, your symptoms are not typical for a new HIV infection, either in their nature or their timing following the sexual exposure. Fourth, in response to your follow-up comment below, oral sex carries little or no risk for HIV; the virus has never been known to be transmitted by cunnilingus (oral contact with female genitals). Fifth, as you already understand, a negative HIV antibody test is at least 90% reliable.
From a strict risk assessment standpoint, and on the basis of your symptoms, you didn't need HIV testing and need not be tested again. However, most people in your situation should be tested at 6+ weeks; the negative result probably will be more reassuring than my words. Or you could have a duo (i.e. "combo", "4th generation") test for both HIV antibody and p24 antigen, which can be done at any time; it is 100% reliable 4 weeks or more after exposure. It rarely if ever gives false positive results; that's not a reason to avoid testing.
In the meantime, stay mellow. It is exceedingly unlikely you have HIV; if you have additional testing, you can expect the result to remain negative.
Regards-- HHH, MD
and btw, I did perform oral sex on her without any barrier. No oral sex from her to me though. Would that increase the chances?