I am a 21 old girl. I had intercourse with my boyfriend, half an hour ago. He used a condom. After his orgasm, we still lied there together for some minutes. (I was on the top). After the minutes when his penis started to get smaller, some of the semen dripped out of it and touched just the place slightly under the outer lips. I immediatly cleaned it with a handkerchief and after 15 minutes i washed myself. Do you believe that there is a chance of pregnancy?