I am due to change my Nuvaring in two days. (I do not leave it out and have a period.) Last night my boyfriend and I had sex, and he ejaculated inside me. The Nuvaring had fallen out, and I fell asleep and forgot to put it back in, so it was about 7-8 hours until I remembered and put it back in. From what I've read, I should put in a new one now. My question is, could I have gotten pregnant from the speed already inside me? Do I need Plan B? Thank you.