Well the odds are not thar high, if your herpes outbrake sores, where in contact with her vaginal fluids ther would be some risk but no even close to 30%, probably the same as unprotected vaginal sex 1 / 2000, but a test would be warranted, at 6 weeks your test would be 95% accurate and at 3 months conclusive.
She is not anwering your mails since she already answer your question once, and if you keep sending the same question she can feel insulted or something like that and want to make you stressed if she were positive she had told you,
Good luck
6 to 8 weeks but 3 months is conclusive
also a herpes breakout you would of noticed before the sex started