There is a common misconception that IgM testing identifies new infection and IgG identified established infection. That is true for other disease states but not herpes. IgM can be present with old infection as well, and the IgM test itself offers many false positives. fortunately, that didn’t happen to you.
It’s possible that the antiviral medicine could make a different in the progression of illness, if it was herpes. It could also have not had any impact. If you take medicine any longer, it can impact future antibody testing – 5 days will not imapct testing.
Let’s wait to talk more until he gets his results?