Should I Be Worried About Being Pregnant After Taking Plan B, Given That I M 3 Days Late With Cramps And Bloating?

I have a quick question. I did the deed on my first day of ovulation according to the Flo app I have. He pulled out and I freaked out bc I saw white clear ish discharge in my underwear, he got me a plan B and I took it the next day. I got slight spotting only when I peed and wiped and for one day I felt something come and it was brown ish red. Few days later that went away, I’m currently 3 days late and I feel cramps and my stomach feels bloated. Should I be worried?