Im 18, and me and my fiancee' decided to use whipped cream while i was recieving before i actually had vaginal sex..the next day i have this greenish yellow discharge.. i wne to the docter, they told me that it was not yeast, a bacterial infection, or germs..we used a condom since i am not on birth control..what could this be? i was protected and did not perform oral sex that night?i dont want to fear for the worst but what could it be?