YES especially if u r in any pain they can test hcg levels and see if they r dropping u may b having a miscarrage :(
It really depends on how heavy the bleeding is, and how constant. First, try lying down and drinking a lot of water, to see if that will calm the bleeding. If the uterus is contracting, that can help.
That said, if you begin to lose as much as a maxipad per hour, or "flooding" that much when you stand up, then you should go to the ER. It could be a miscarriage.