Implantation bleeding?

Allison • 35, married 9/10/05, DS 6/20/08, DS 8/25/09, DS 10/24/16, DS due 4/16/18
Was 9 days post ovulation yesterday. Implantation occurs b/t 6-12 days. Was spotty yesterday but more like period today. AF not due until 8/19. Thoughts?