Baby movement active at night

18 weeks might not be too accurate as you may not feel the movements fully yet. As you progress baby’s movement will be more obvious. They do suggest to only start counting fetal movement starting 26-28 weeks as it will be only obvious enough by then. My baby is also only super active at night. In the day I can’t feel much because I’m usually walking around or moving about so it’s less obvious. And when you’re walking, the rocking movement does make baby more sleepy. I think can feel more when lying down. :)