What Does Clear Vaginal Discharge Post Taking Plan B Suggest?

me and my wife were playing around and i was rubbing my penis on her vagina but did not insert and we got worried the precum could contain semen and it got inside her so i got her the Plan B pill anyways and she took it withing 8 hours of us messing around and there was large amount of clear discharge that came out and we didnt know what that meant or if there was even a chance of her getting pregnant due to her taking that plan B pill and that i didnt even cum inside her?