Loosing weight 😱😱😱

Ci

So yesterday I had my 24 week doctors appointment. They had me go in for a ultrasound to get baby weight. I had lost 10 pounds and baby is only a pound. He said that he is in the 50% tile but I will have ultrasounds at 28, 30, 32, and so on to keep up with babies weight. This happened with my second pregnancy, which they induced me at 36 weeks because my son wasn’t gaining weight and I was loosing. I just don’t understand any of this and they don’t really know what is causing it. My first pregnancy was a completely normal pregnancy. I just pray Kasen gains the weight and he doesn’t have to come early!