When I started feeling her move it would happen quick. Then it got to a point where I didn't feel her. Then it was I only felt her at night. Now I feel her all day
Its normal I was the same way when I was 18 weeks, then when I hit 20 weeks it wasn't as much, now I mostly feel her at night.
It's probably normal. You still are pretty early for the baby. could just be positioned weird. But I am also not a Doctor so this is just what I think.