I am 17 years old, almost 18, and have been on Nuvaring for about 3 years now. I had sex tonight and he wasn't wearing a condom, but we usually don't wear one since I'm on Nuvaring. However, tonight while getting dressed after our sexual encounter, we discovered that the Nuvaring was on the floor among our clothes. Our sex lasted about two hours, and we're not exactly sure when it fell out. He came inside me, and I'm pretty sure it fell out sometime toward the beginning of our sexual encounter. Could I be pregnant?