Girls, hello! My little one is usually active, always and even at nigh…

Girls, hello! My little one is usually active, always and even at night. ? Yesterday she had a 3rd ultrasound, everything was good according to the ultrasound (only a slight tightening of the umbilical cord), but they said don't worry about it. So today my little one has been silent all day, I'm not used to it, for the whole day somewhere down there, maybe three times a bit moved around and that's it. I ate some sweets, lay down and went for a walk. I'm worried, I will write to the midwife tomorrow and ask. First time like this ? Maybe someone else experienced it?