my girl gave me oral while wearing underwear. It was the day her period ended. I came on her breast. But a drop or two dripped on her underwear by sliding through her stomach. Her underwear absorbed it all and it never dripped anywhere near vagina. She immediately wiped it off with a cloth and washed it after in a matter of seconds. But to be safe side she took plan b and had withdrawal bleed within a week and after that she took 5-7 home test after one month from the day she took plan b, all were negative. And after one month from withdrawal bleed she got her period. Is there any chance that one or two drops travel through underwear and make her pregnant after being wiped and washed off?