I am on day 5 of my cycle. Usually my cycle lasts maybe 6 days and I start discharging the old blood. I already don't have much of a heavy flow it's a little red here and there and some brown discharge. This couldn't be implantation bleeding, could it? I always have a 6-7 day cycle. I always have blood clots come out, which is nothing to worry about. I am also on blood thinner.