So we were foreplaying and I gave him a handjob and he wiped a bit of his semen with a napkin. It was really little. After 5-10 mins I accidentally used the same napkin to wipe my vagina. Just 2-3 seconds after starting to wipe it, he stopped and informed me about it being used and immediately gave me a fresh one and I used that properly to wipe my genital area. The semen has a full chance of being dried out by the time I used, i think so. And also, I'm not sure whether I used the same side to wipe my skin or no. Still considering I used that side, is there a need to worry? I'm a virgin yet and he had only wiped about 1-2 drops left on his finger. Still, I'm worried.