Implantation bleeding 3 days before af is due

On the 25 I went to use the washroom no cramps nothing just a typical pee u know when I wipe I seen this now I’m never early if any thing always late by a day. This lasted 2 days by the 3rd day around 3;00 was brown. My flow was suppose to come on the 28th and still nothing only cramps, today is the 29th no bleeding just cramps did I jus experience implantation bleeding