For what it's worth, I did ask her the next day if she had it, and she said no, but I am aware she could have it and not realize it. From what I understand, they are tested once a month for most stds, but not herpes.
i too had an encounter much the same. i too did not have either form, got a blowjob, and used a condom for sex. but i have an itchy red spot on my upper thigh. waiting is going to kill me.
I believe it was Rocco Siffredi who said in one interview, that basically everyone "in the business" has herpes.
But seriously speaking, the risk from a single exposure is low.
I'm going through a herpes scare myself as we speak (going on week 8). If you don't develop any symptoms in the next few weeks, you're probably in the clear. But it is easier said than done to stay calm.
Try to learn from my mistake and don't inspect your Johnson too much, just live normally and if you get any symptoms, see a doctor.