Question about plan b? Missed period?

B

Took a plan B and had my period for 3 weeks. Almost a month. Jan 4th -24th around there.

I had sex after , currently sexual active. My period still hasn’t come and it’s February 7th. My question is , can plan b mess up my period the 2nd time around??? Is this the reason my period might be delayed since I was bleeding almost for a month? Thank u.