Has plan b failed you? (Or anyone you know)

My predicted date was the day before we had sex and he came inside, but im almost positive it was that actual day of sex because I chart heavily and know my body very well. We had sex two weeks prior to my expected next period, everything adds up perfectly. And I missed my mini pill two days prior and according to my OB that would have made me 100% unprotected and I would if had to be on it consistently for at the very least two days. Just because I dont have a high hope I have came to the fact that I could possibly be and I and my partner would be excited. Im trying to not be excited of the possibility though because I know it may still end in disappointment. I had no idea the effect EC had on ovulation prior to taking it. I took a take action pill.