dear friend , there is nothing to worry a lot as this bleed is quiet common in pregnancy. Spotting or bleeding may be a sign but many subchorionic bleeds are detected during a routine ultrasound as is your case. While most subchorionic hematomas dissolve on their own, it is possible for the clot to get in between the placenta and the uterine wall, resulting in miscarriage.More than half of women who bleed during their early pregnancy go on to have perfectly healthy pregnancies. caution to be taken are rest, refrain from lifting heavy objects, and avoid exercise & sexual intercourse until the hematoma dissolves and disappears. report in case of further query.