My long-distance boyfriend was in town for a visit last week and we, of course, had sex. I've been on the pill for over a year and we also use condoms every time to be safe. At one point, after we were finished, he pulled out but the condom stayed in me rather than on him. It hadn't fallen out during sex and was still sticking out and visible. This scared me, however, because I don't know what that does to increase the risk of pregnancy. Yesterday, I took my pill a few hours late and today I'm experiencing brown discharge. I'm on my last week of pills before my placebo week, but it's also been roughly 7 days since the condom incident, and so I'm worried that it also may be implantation bleeding. What is the likelihood that this is pregnancy ?