Ok, so is there a risk? Yes because you had unprotected sex.
Is it a big risk? No. The time was quite short but also, if you believe her that she doesn't have unprotected sex then she would not have anything to transmit. If you do not get any symptoms over the next week (I doubt you would) I would move on.
It is never a bad idea however for both partners to get tested when starting a new relationship :)