MORNING AFTER PILL

I took the morning after bill on last Monday night. The accident happened on Saturday night and we wonted to be better safe than sorry. It happened as he was pulling out so I do not think we had anything to really worrie about anyhow. My question is I have started bleeding again and I had my period the week before. It is very light and I feel like I am on my period again so do not wont to worrie about anything but it does not mean I dont wont to ask. Can I get a apinion about what this could be and why I could be doing this. I have never had them this close if that is what it is.