kimberlee is right you need to get to the er and call your doctor. bleeding and clots is NOT a good sign. that is one sign of a miscarriage.
Heavy bleeding/clots isn't a good sign in early pregnancy. If you're bleeding that much you should probably go to the ER and they can tell you more, they might do an ultrasound or check your HCG levels, but definitely at least contact them and let them know about it. I hope everything works out for you!