Am I pregnant?

Hey guys. I had unprotected sex the 8th of this month, ovulated the next day. I took plan be the day of ovulation around 7:30pm. 6 days after I took it, I bled on and off for a few days. Was not heavy. After that stopped, couple days later I started cramping and having sore breasts along with up and down emotions and nausea coming and going. I know plan b can cause your period to be thrown off but I did not get my period when it was due on the 23rd. I don’t know if the bleeding I had few days after taking plan b would be considered a period coming early. Plan b is meant to prevent ovulation, so do we think it failed due to taking it on ovulation day?? I am over a week late for my period as it was due the 23rd. It has been 21dpo. What do you all think?