Ordinarily, I'd say since your last unprotected sex, but since your partner was hsv2 positive, and you've had the low positive IgG tests, I'd say you could try now. If money is an issue, and you are self-paying and can only test once, you could wait 12 weeks from your low positive test, and test then.
In the meantime, you could maybe do another IgG and see if your numbers are rising, if it was catching you as you were developing antibodies.
Briefly rubbing against you probably isn't going to transmit anything.