2 days ago, me and my girlfriend were grinding for quite some time. After a while, we had unprotected sex, but only for 10-15 seconds. I didn t come. However, we re concerned about pre-ejaculatory fluid. Before this happened, I didn t have an ejaculation for 3 days, so there shouldn t have been any remaining sperm. Since we absolutely can t get pregnant right now, we re wondering if it s necessary to take a plan b pill. What do you think