Is this normal? Or should my doc be putting a rush on it?

There's no need to rush it- it's more informative to have it later in the pregnancy, when the baby is bigger, so they can get a better idea of how the baby is positioned and how your uterus is postioned. The baby is going to grow so much over the next several weeks, it would be better to see it when it's bigger and is starting to run out of space, than now, when it has plenty of space. Depending on the results, they might want to see you back around 36 weeks, to see if there are changes.