Hi, girls. Plan B question??

Katie
I took Plan B about 10 days ago and had a tiny bit of dark discharge last night, with bleeding this afternoon. Is this normal?? I know it can screw with hormones, but it just caught me off guard. I ended my cycle about a week before I took it. My fertile window wasn't supposed to be happening. Just have no idea how to even bring this up with a new guy I've been seeing. Condom broke so we wanted the best insurance we could get. Any experiences are welcome, because this could be a lot of different things. I think the confusion and worrying is probably making me feel worse too =/