Honest opinions- possible implantation or AF

Lori

So this morning I had started bleeding and immediately thought it was AF but I’m 4 days early. After remembering that implantation can occur from 6-12 days I’m starting to question it. It was dark red though and everything I read says implantation will be brown or light pink. Usually I’m a heavy bleeder but it’s slowed down within 3 hours to almost spotting but not quite. I’m so confused 😩