I'm so glad you asked because it can be stressful tackling these questions. It also gives me a chance to clear up some misinformation that is out there about HIV. I know it can be hard to get the right information so I hope this helps.
HIV can be transmitted through five bodily fluids including breast milk, blood, precum, semen, and vaginal secretions. It cannot be transmitted through saliva, and in the case of transmission through oral sex, the risk is at the lower end of the spectrum compared to unprotected vaginal or anal sex. You can definitely learn more about the specifics which may ease your mind through this article: https://h-i-v.net/transmission .
That being said, the CDC recommends everyone get tested regularly. If you haven't ever had an HIV test, you can find more info about it here: https://h-i-v.net/living/testing-quiz . Does that help to give you a place to start? I am sorry you are dealing with these STIs and feeling so scared, I hope we can provide some peace of mind and information that can help. - Liz (Team Member)