7 weeks 3 days doc said hcg levels going up very good nd saw heart beat but why when i wipe i see brown blood veey brown blood like old blood?

Bleeding/pregnancy: Bleeding in early pregnancy can be the first sign of a miscarriage although many pregnant women will experience bleeding and go on to have a normal baby. Often as the placenta is forming there is some bleeding that occurs that rarely threatens the life of the baby. Sometimes you can see this on ultrasound. Hormones rising and seeing the heartbeat are very good signs that thing will turn out ok!