plan b bleeding ?? Please help!

So about a week ago I was having sex- ya know, like a regular woman. We both finish and he pulls out. We sit there for a second then I look over at the condom and it doesn’t look how it usually does. Turns out the thing fucking broke, and so we got up and rushed to cvs. He bought me plan b and I took it- we went on with our night. It’s been almost a week (6 days) and now I’m bleeding just as I would be on my period. Weird thing is- my period just ended on the fricken 17th!! I’m scared, and don’t know if the plan b worked or not? I’m just confused, and don’t really have anyone to talk to about this type of thing. Please help!! :/