My ex boyfriend and I fooled around and although we didnt have sex he rubbed his penis over my vagina to bring me to orgasm....probably a minute or two... he probably had precum. the next day i saw that i had a little open bump on my outer lip, which i likely had before, but am afraid increased my chance of catching something. i didnt really worry about it before as i assumed this was totally safe sex but now am not so sure. i was taking doxycycline another three days for my skin so i am also wondering if that would have stopped the infection if there was the possibility of getting one. im kind of worried about chlamydia. thanks.