Hello girls, I have a question. I'm a mom of two kids, and I know that…

Hello girls, I have a question. I'm a mom of two kids, and I know that there should be three ultrasounds at nine months. So, according to my calculations, it's 32 weeks and 3 days, but according to medical calculations, it's 30 weeks and 6 days. I call my doctor and ask when I can get an ultrasound. She tells me I don't need one anymore. I tell her that I already have a screening done, and she says it's not a screening and I don't have indications for a third ultrasound. What kind of indications should I ask about? I've had two pregnancies before and everything has always been fine.