Ladies pls help!

I had my period as normal about a week and a half ago. But soon after I had unprotected sex, but my husband pulled out and I also took plan b just hours after.

As of yesterday—I started bleeding. Not just spotting. Like I am on my period. To give you an idea I had to use my diva cup and i filled the entire thing in about 10 hrs. This is the second day now and I’m starting to worry.

Does any one have any experience or advice? I would really appreciate any feedback