Me And My Gf Had Do Rubbing Genitals For 1

me and my gf had do rubbing genitals for 1 minute. i know that i touch her vulva by head of my penis. i dont know if precum occurs but what if it is? she is 5 days delayed now. what is the best to do? is she pregnant? october 14 was her last mens. we do rubbing november 13. no signs of menstration til now. help please