I am young and afraid to go a doctor. I have had oral sex. What STD's could I possibly have? Please help.

Oral. the main ones from oral sex (female performing on male) would be HPV, Herpes and gonorrhea. Fortunately we don't see very much genital herpes of the throat, nor gonorrhea. HPV should be enough reason to use a condom during oral sex. Your partner will still have fun if a condom used.