Basically, me and my boyfriend were "fooling around" and he finished. He didn't get any onto his hand but he wiped his stomach with a tissue and then used another tissue to make sure that there was none on his stomach, but could the sperm on the tissue come into contact with his hand? But then he came back in and half an hour later he started to touch me down there and by my vaginal opening and I was yes, very "wet" I'm really worried that I could be pregnant.