If the last time you had sex was four years ago, nothing happening now would be a new infection. And the negative IgG for HSV 2 should be counted upon as accurate with 92% certainty, compared to the gold standard western blot. If you were infected four years ago, the antibody test would be positive within 12 weeks, even if you had never had an outbreak. The test reflects INFECTIONS, not outbreaks. Forget the IgM – it is just notorious for the false positives and the CDC says never to order it.