I had a protected sex with a sex worker and unprotected oral sex last night, do I need to take prep for Hiv?

STD Testing. With your history of risky sexual behavior you should always have frequent follow-up with primary doctor and receive frequent testing for sexually transmitted diseases. Having oral sex and intercourse with sex workers is an easy way to contract STDs, including HIV. Best course of action is to avoid these situations, use protection at all times.