The symptoms you describe are not suggestive of HIV. The sore throat came on too soon, and even in people at risk for HIV numerous garden variety viruses are far more likely causes. This is the main reason that symptoms almost never are useful indicators of new HIV infection. Most important, HIV test results always outweigh symptoms in judging HIV infection. And on top of that, you had a very low risk exposure.
You should discuss your concerns with your doctor, and perhaps s/he will recommend another HIV test after 6-8 weeks to further calm your fears. But you really have no worries about HIV in this situation.
Regards-- HHH, MD