Low movement on US?

17 week appointment- I got to see Baby Bear today because we couldn't find their heartbeat on the Doppler for more than a second. Midwife said everything was fine, and did a bedside ultrasound. She showed me the heart flicker but I couldn't see it as well as I saw it last time this happened, and Baby Bear didn't move a whole lot.. just wiggles here and there. I'm feeling stupid because she told me everything looked great and all, but I was just wondering if anyone else has had a later US where baby wasn't moving much? I'm such an anxious pregnant lady 🤦‍♀️😭😂