A day late - and I’m never late!

I took a plan b (Ella, specifically) about 14 hours after unprotected sex a couple weeks ago (29th/30th) while I was a day away from ovulating. I thought and hoped maybe because I was so close to ovulation that my period would stay on track... is it normal for Ella to throw off a period and make it late?

I had a day of pink tinge where I’m thinking it was breakthrough bleeding on Monday or Tuesday, and it went less pink and more brown for the next day and now there’s no color.

I just am hoping that the pill worked for me and I’m not late because I’m pregnant lol.

Any advice?