Assuming her test wasn't a false positive, which is possible, then yes, you have a chance.
Have you tested? You could have it, and never have symptoms.
If oral lasted less than a couple of minutes, the chances aren't high, but there is a chance.
If she's had enough time to test, and get her results back, and you haven't had symptoms yet, I wouldn't worry. Most of the time, symptoms appear within 2-12 days.