Bf and I were making out. He picked me up and I felt his tip first on my butt and then at the side of my vagina. I was wearing cotton tights and underwear and he had on shorts and underwear. When he put me down I saw a drop of precum that seeped through his shirt and it worried me a bit that it went through my clothes too. I went home after and took off my pants and underwear and wiped the spot he touched with toilet paper and then I'm pretty sure I washed my hands. After that I masturbated. Could there have been a little precum still on me when I masturbated? Could it make me pregnant? This happened 7 days after the end of my period.