I had protected sex with a woman in a room. But the lights were off and on withdrawal the condom wasn’t on my penis, I ejaculated on her bottom. Turn on the lights and the condom was hanging half way out. Would I have been exposed?
No, you were not exposed. A condom hanging out indicates that it slipped off when you were withdrawing. As long as the head of your penis was covered during intercourse - and it clearly was - you were never at risk for HIV.