late ultrasounds?

Bryttany
I'm on tricare (military) stationed in Hawaii now. With my son I had my first ultrasound at 11 weeks in Germany. Here they tell me don't expect one till 20 weeks and a second at like 32 weeks and that's it... that doesn't seem right to me at all. I had my first appointment this month and no ultrasound. Second appointment is November 2 and they said heart beat but no ultrasound. Just seems ridiculous, but maybe I'm wrong. I'm considered high risk because of multiple complications from my first born. So can anyone else please tell me does 20 weeks seem way to far off for my first ultrasound?