Brownish blood is caused by some of the precursors of miscarriage, such as insufficient corpus luteum function, or bleeding caused by strenuous activities and exertion. First of all, you should go to the hospital to have a blood test for progesterone, and secondly, you need to rest in bed and avoid exertion and sexual intercourse. If the progesterone is too low, you need to take oral or intramuscular progesterone to supplement it, and you need to stay in bed to avoid the precursor of miscarriage caused by exertion. At the same time, we also need to find out whether there are other factors, such as infection, or ectopic pregnancy and other phenomena caused by bleeding, you should do an ultrasound examination to ensure that it is an intrauterine pregnancy, and then carry out fertility preservation treatment.