An index value above four probably has an 85% chance of confirming as positive. But if she has no symptoms, she may wish to confirm that with a better test.
Both of your immune systems will handle herpes in its own way, your symptomatic presentation will not impact her, unless she just wasn’t recognizing symptoms previously.
We don’t have data on the reduction of transmission between two women but it decreases viral shedding by about 70%.
Once you have HSV 2, there is very close to zero chance that you will acquire HSV 1 subsequently.
Terri