I had precum on my hand and then fingered her is it possible that I have gotten her pregnate ?

im not 100 percent positive but im sure that if sperm is exposed to oxygen ( the air ) the sperm should die off im sure you would of had sex to get her pregnant, but im only 16 and im worried i could be pregnant, my worries are different though lol so yes anyway im not positive but i sure she isnt pregnant as i said it has been exposed to the air so you shouldnt be ... if your still unsure, why not suggest pregnancy tests to her just to put your minds at ease