a good chance she might have oral or genital herpes

I made out with a girl a few nights ago and it turns out there is a good chance she might have herpes (not sure if oral or genital. When I found this out I stopped because I was drunk and was freaking out in my head. I didn't notice anything around her mouth so I don't think I have anything. But still, can the virus only be spread when the blister occurs? Because I have been hesitant to masturbate/come in any physical contact with anyone since it occurred in case it somehow spreads doing that. ANY help will be much appreciated. I'm probably just freaking out but can never be too careful.