What does it mean !!!

Mia

I had unprotected sex on the Sep 9th and OV on the Sep 15th . I started with spotting on the Sep 25th and it was bright red now I’m on day four and it’s heavier. I’m supposed to start my period tomorrow Sep 29th . I am unclear if what I’m having is my period early or if it’s implantation bleeding?

I just have to know if it’s implantation bleeding will I stop bleeding tomorrow?