If the USG scan is done in early weeks (around 5-6 wk), then fetal heart beat/ pole may not be visible. It is usually seen in 7-8 wk through abdominal USG scan or around 6-7 wk through TVS scan.
Here, you need to repeat the ultrasound
scan after 1-2 wk. Subchorionic bleeding may cause continuous mild spotting or bleeding. You take adequate bed rest
, folic acid
Please, consult with gynecologist with follow-up scan. Good luck.