You have not mentioned if the girl was a sex worker for infections from sex workers can be very resistant , anyway private parts of females are loaded with various opportunistic pathogens, which an entry to oral cavity can cause infections of various kinds. You are advised to get a throat swab culture and sensitivity test done at a reliable pathology lab, and take appropriate antibiotics and supportive treatment ( betadine gargles, b-complex, analgesics etc for full recommended duration. Ensure hygiene of your partner before indulging in abnormal sex.

Hello. Thanks for your contact to healthcare magic. If I am your treating Doctor I would like to tell you that flu like symptoms after a oral sex has wide etiology ranging from HIV to strep viral infection. I advice you can go for Grams staining for throat. Also go for P 24 antigen after 28 days to confirm about HIV. If Grams stain show bacteria start antibiotic. Till that time continue with the paracetamol. If you have to ask anything else to me kindly contact me. Dr. Arun Tank. Infectious Disease Specialist.