So yesterday my girlfriend and had sex and i pulled out in time and ejaculated. there was some sperm in my hand and i had wiped it away with a paper towel. about 20-30 minutes later i fingered her but now i realized that i may have had sperm on my hand. I'm really worried. I think i accidentally touched the paper tower again but wiped it off shortly after before i fingered her. i dont really know what to do. How long can sperm last in contact with air? Do you think she can get pregnant? are the chances high or very slim?