Help!!

So I had sex 3 days after my period, the condom slipped off during so I took plan b and then the next day had unprotected sex again 😩 didn’t do anything about it. Four days later I check and I’m bleeding. It fills up a panty liner pretty good, no cramping or anything. Could it be side effects of plan b or implantation bleeding?

I don’t ovulate until the “24th” and I just became fertile the 19th.

Am I pregnant?!