Taking emergency contraception after having unprotected sex. The HPV vaccine is now available for adults up to 45 and protects against multiple strains [ 17 ]. Getting tested for STIs — before new partners, after having unprotected sex or having sex with a partner who has an STI Ask whether your partner s have an updated STI screening Not sure if you should get tested? Planned Parenthood has a quiz to tell you if you should.