Jojo,
Well, at least you didn't hide anything from your partner. She knew the risk, especially if you decided not to use added protection (condoms).
You both made a decision to take a chance. I'm sure you know that even with valtrex medication you can infect another during sex. You're right that the chances are lower, but it's not zero.
Hopefully, she's fine. However, maybe next time you should play it more safe by also using condoms.
Good Luck.