Hi,
Welcome to ehealthforum,
Having brown discharge during early pregnancy is common and considered to be normal. Few women also have period like bleeding (lighter and shorter) at expected period time which is known as decidual bleeding. If bleeding/discharge is associated with cramps, backpain and bleeding with clots, then it is not normal and you should visit your gynecologist at the earliest to rule out chances of miscarriage. Take adequate rest. Drink plenty of water. Maintain healthy diet.
Take care.