Bleeding on Plan B?

I just had my period about a week ago.

The day my period ended, my boyfriend and I had unprotected sex.

I took Plan B within 24 hours.

3-4 days after, I am experiencing heavier bleeding than my period and I’m on my 3rd day of it. This is 5 days after my period ended and I am supposed to be ovulating in my normal cycle.

Is this normal?