Has anybody gone through implantation bleeding yet? Does anybody know how long the bleeding is supposed to last? Because I started bleeding on the 19th of January and the implantation bleeding continued on to the 20th of January. And I think the bleeding stopped completely as of today! But for those two days it was heavy bleeding and not so much spotting, but the blood was bright red. Im worried about it , Hoping I didn't have a miscarriage.