I recently had vaginal sex with an HIV-positive sex worker, and I used a condom throughout. I'm confident the condom didn't break, and I ejaculated into the condom, not her vagina. The sex wasn't very rough, and I didn't see any blood in her vagina. What are the chances I could have contracted HIV from this encounter? Should I get tested, or am I safe because it was protected sex? I'm really looking for some advice here.