Last day me and my gf did the dry humping. However while we were grinding each other, i realized that i had pre-cum on my underwear ( she was necked and i had underwear and pants) i took my finger into underwear to check whether any pre-cum appeared then i felt asleep for one hour. But the thing was, after waking up, i did the fingering with my gf by that fingers which i had used to check underwear before, so any possibillity to cause pregnancy for my girl?