You are going to have to get yourself retested, unfortunately, if you want to get to the bottom of this. The IgM tests for herpes are notoriously inaccurate, and the chance of a false positive is high. Since your IgG is negative, if you do have HSV-2, it would be a recent infection. But I would not ever use the word "definite" with a IgM HSV test.
So, if you do have an outbreak, you can get that PCR swabbed and typed to see if are are infact HSV-2 positive. If you do, make sure to go in the first 1-2 days of the outbreak for best results. I would avoid culture if positive because of the strong chance of a false negative.
If you continue to be asymptomatic, you are just going to have to wait 3 months post exposure and retake an IgG type specific test. That is really the only way to accurately diagnose HSV in asymptomatic cases.
thank you! Just what I thought...