Has anyone had implantation bleeding?

Brenda
I started spotting on the 2nd. Hardly anything when I wiped. Yesterday though I went thru 5 panty liners. The blood is brown almost black and bright pink when I wipe. This morning I put on a pad. I have read SO many things about how implantation bleeding does NOT get heavier but mine did. I am now 9dpo. AF wasn't due till 11/13. Do you think I'm miscarrying?