Hi Early This Momth My Girlfriend And I Engaged In

Hi
Early this momth my girlfriend and i engaged in manual sex. I touched her first which lead to just her giving manual sex to me. I didn't ejaculate but i was touching her for a long time initially. After she stopped giving manual to me There was pre cum on my penis. I remember holding my penis a bit during it and after it too. After she stopped i rinsed my hand with a bit of water. After a bit of time i went back to giving her manual sex but im not sure whether my hand was dry or not (it was most likely dry)
What is the risk of her getting pregnant from this? My hand was in direct contact with her vulva (also, i never inserted my fingers inside the vagina, only the clitoris)
I had previously ejaculated 2 days ago which means i would've had a whole day to flush out my urethra right? So that means my precum wouldn't contain any sperm would it?

Thanks