Miscarry?? 9 wks 3 days

Went to the Dr to get my first ultrasound, and the tech said she believed the heart beat stopped at 8 wks 3 days. I've been praying so hard in hopes that she's wrong. I really want this baby. I makes me so sad. My bf said he just a small dot, which when I looked online it said the ultrasound couldn't be clear and all that was seen was the head. I haven't had any bleeding or excessive pains. I'm so stressed out right now, and I have no clue what to do with myself right now. Prayers please please please!!!!!