Thanks for the query.
Brown colored blood usually indicates collected blood.
Turning into red color may indicate fresh blood.
So better to consult gynecologist as early as possible.
Get examined and undergo ultrasound
to find out the status of the fetus and placenta.
Then with your doctor's advice, you can follow measures like :
supplementation to stop the bleeding.
-Analgesia to decrease pain.
-Hematologic investigations the estimate the hemoglobin
levels, to rule out Rh negative
For more details : http://srsree.blogspot.in/2013/03/early-pregnancy-loss-abortion-2.html
With this workup, the bleeding can be possibility controlled.