I'm a little surprised to see that you say that HHH and Hook say they haven't seen a case of herpes from a rim job. The anus is a mucous membrane, and you can get herpes from contact that way.
In any case, that doesn't seem to be the case here. Heaviness isn't a symptom of herpes, nor is a white patch or testicular pain.
Have you seen a doctor? You should.
It's not common to get other STIs from rimming, but that doesn't mean something isn't happening. Testicular pain should always be checked out. It's been 11 days since the encounter, and 7 days since symptoms started. Go see a doctor already.