Am i pregnant?

Hi!

I’m not sure in which topic to post this in. But I took Plan B on Nov 30th, which was 2 days after my ovulation day ended according to the app. I started heavy bleeding on december 6th, for 6-7 days. It’s been almost 4 weeks now and my period still hasn’t come. Is it supposed to come next month because obviously the plan b threw off my entire cycle as I was originally supposed to get my

period on December 11th. I need help :(