Okay guys so look

Baby • Mon, Jan 20

I had unprotected sex on Dec 12 But I instantly took plan b in the same day not more than 5 hours after sex. eve predicted that my period would come on the 13 but i know since I took the plan b I would be late, I was 5 days late then my period came. But now I’m 2 days late and I’m not understanding why, is it because I took the plan b last month? Please let me know