How would you know?

Hi mummies, Just curious. How would you know if your tiny one inside is growing well , properly and safe + sound if you cant feel their movements inside? Esp if youre still in your first trimester..? Im 10w5d today and i Just recovered (hopefully! Fingers crossed) from hyperemsis since 3days ago.. Was ever told that having hyperemesis isnt really a bad thing cos its one of the signs that baby is healthy and good inside. Now that ive recovered, it got me thinking "so, how do i know if baby is doing well inside now ?" 😅