Totally normal, upto 6 weeks is generally considered normal. Is it lightening? If it's still heavy and bright red I might check in with the doc, in case for some reason your uterus isn't clamping down properly.
Mine was almost gone, then it picked up again at about 3 1/2 weeks and was much redder and heavier for about a week. It's reduced to almost nothing for the last couple days, so hopefully it's almost done. It will be 5 weeks tomorrow.