If you find out your partner has committed unfaithful acts, stop having unprotected sex immediately. A person unknowingly catching something from someone else and passing it along to his/her partner is not uncommon. While some partners admit to cheating right away (usually because it was an accident), others will hide affairs and hookups for years–oftentimes with multiple people. You have no idea what your partner (and quite possibly yourself) has. Therefore, schedule for a check up that tests for STDs. Insist that your partner has one, as well. Until notified you are safe by a doctor, use proper protection.
Contributors: Justin Lavelle from PeopleLooker