Plan B !

hi everyone! i took a plan b just 4 days ago & today i started bleeding (enough to fill up a pad) but my period is not due until almost 2 weeks. yes I am aware of the side effects of the plan b and read the whole side effects! ik it can delay or make your period come early and it can also just cause bleeding. I was just confused because it seems like a lot of blood! is it my period that just came super early or bleeding from the plan b! Thank you in advance for any help (: