A PCR would only be positive if there was virus present at the time of the swab.
As I mentioned, the IgM is useless due to high rates of false positives.
What you need is an IgG test which is more accurate.
No, herpes would not ever show up in 5 hours.
You mention that your partner is negative but if that is also an IgM test, that is not useful
I’m afraid that is all the help that I can give you without further better testing.