First Ultrasound

Today we had our first ultrasound! Based on LMP I’m about 7w5d but according to the ultrasound, baby is measuring around 6w1d. It makes sense since I’m pretty sure I know the exact day of conception 😂 I’m a little nervous though, the tech had a hard time measuring the heartbeat consistently. She said it was tough because the baby is so small. She was about to measure between 95-103. She didn’t seem concerned, but I’m a little worried that it was so low. Has anyone else had a similar experience? I’m posting the pic below even though you can’t see much!