How To Confirm Pregnancy?

I had a girl, we do kiss, & romance atimes i rub her ass with my hand which at times releases some fluid like ejaculating , on a good day i nearly had sex with her but i only use my cock head to rub her pussy which i felt like penetrating, as i was about to start, i released sperm which splashed on her body but nt sure on her pussy the rest on the floor due to the romance we had, i was nw thinkin maybe she wont get pregnant. 3days ago she called me dat she can t see her period, but no spitting,early sleepin, vomiting so i m worried pls what might hav happened? though she is still a virgin because outlet of blood never occured throughtout our time of being together.