What Causes Genital Herpes?

i was at a concert and i was dancing with this girl. We kissed very briefly a few times, no longer than a couple seconds each time. I put her on my shoulders at one point and she put her fingers in my mouth for some weird reason. At one point she stuck her hand in my pants and touched my penis very briefly (i have no idea why, i just wanted to dance). Im a very paranoid person, and just wanted to ask, can any of this lead to me contracting genital herpes? she had no visible blisters or lesions on her face. Thanks for your help, i know i m probably thinking irrationally but i just need an answer before i can move on. Im now starting to over analyze every part of my private parts 1,000 times a day and thinking every little mark or every time i get an itch or a very minimal pain is a symptom.