I always make sure to help with pulling out so the condom stays in place. I make a peace sign with my 2 fingers and slide them with the rolled edge of the condom. Sometimes if they pull out too quickly the condom will slip of causing a mess. You should know what's going on down there at ALL times to make sure there is a condom between the two of yous. If there was a chance he pulled out quick, pretended to pull off the condom and you are not sure if he ripped it off during, you can always smell yourself in the bathroom when you pee. We all know what it feels and smells like. I have a few clients who don't have anything come out when they orgasm. I still use protection though because that doesn't mean they can't have an std. Good luck. You should be on a schedule of getting tested regularly. Your doctor can tell you how often you should based on your exposure rates.