Does this sound like a normal period after taking plan b?

Hi! So I took plan b a couple of weeks ago. I got my period but it is now the 6th day and it’s not as much blood but it’s pretty red. My period normally ends on 4 or 5th day. Since tomorrow will the 7th day of my period should I be worried if the bleeding doesn’t stop? Or is this common since I took plan b?

Thank you