Heart beat? Ultrasound??

Mariah
So I had my first appointment today! I'm 7weeks 5days. I don't get to meet with my doctor until my second appointment but the nurse practitioner said we won't get to hear the heart beat until 10-11wks. Is this normal? She said you can't hear the heart beat until 10wks. And I won't get an ultra sound until 20wks and that will be the only one I get. I don't know what to expect but I'm not happy with any of this.