So I was hoking up with a guy last night and he came on my vulva/vagina area without even putting it in. He was kinda rubbing against my labia and then he burst all over me. My questions is should I take plan B? I'm not on bc but is there a chance I could get pregnant even if it wasn't inside me? He came on my lips labia and I think some might have gotten to the entrance of my vagina but he didnt cum inside. So what should I do? Should I be worried?