What have your days been like for the last few days? Are you babymooning? Resting more than you are up and around? Are you skin to skin, bonding with your baby?
Generally, when you have a "backslide" in your bleeding, it means that you have over done it a bit. It is actually a wonderful way for your body to communicate to you to slow your pace down and remember to simply be...with your baby...quiet...still.
I would feel your uterus, and make sure that it feels like a large, firm grapefruit. as long as it does, and you are not getting large clots, you SHOULD be okay...just listen to your body. If it tells you that you are overdoing things, slow down. Be gentle with yourself...you just did the physical equivalent of running two back to back marathons, and you need to take the time to let yourself heal.