I was due on 12/5 but AF showed this morning at like 730 kinda heavy but not really. And I had cramping for around a hour at most then the cramping went away and now the bleeding is stopping.. like all I had on the tampon was brown and a smidge of pink... idk what's going on.. anyone expierenced this before? I'm between 11 and 13 dpo.. it's too late to be implantation right?