Im 33 weeks pregnant but uterus is measuring at 29 weeks.

Michelle
I'm 33 weeks and had a midwife appointment yesterday and she said that my uterus is measuring at 29 weeks. She said babies heart beat is strong and is already head down. And she is always moving. This is my second baby and she moves more than my first little girl so she is perfectly healthy. A similar thing happened with my first child she always measured smaller than her due date so they set my due date back a couple days. And in the end I got induced at almost 42 weeks and my daughter was still only 6lbs 3oz. So my midwife says I just make small babies. But my worries are still getting the best of me. She scheduled me for an ultrasound that will be repeated again two weeks later to make sure baby is growing enough and to make sure the head isn't bigger than the rest of the body. So naturally my brain is focusing on the negative no matter how positive I try to be. Anyone else go through something similar? What does it mean if the head is bigger than the body?