PERIOD CAME ?? PLAN B BLEEDING? IMPLANTATION

I had sex Saturday morning I took a plan B around 2/3 ... Couple days later I’m having heavy bleeding ! I have had BV in the past and I never got this as a symptom ! I thought I was getting bv the second day so I used some metro gel I was priscribed months ago and everything went back to normal but now I’m having heavy bleeding !!