I was 6wk 4day preg when i had 1st us. baby measured accurately, but heartbeat was 95. should i be worried about miscarriage?

Some: A fetal heart beat of only 95 is concerning but could have many causes and doesn't necessarily mean that you are going to miscarry. A follow up ultrasound will undoubtedly be done to look for interval growth and your doctor may want to do moreb testing if the heart rate remains low. Serial HCG levels and progesterone levels can also be done to assess the health of the pregnancy. Hope this helps.