First ultrasound. :/

Myers
I have my first appt fri, and I called my OB to see if I would be getting an US. I want my mom to be there for the first one. Anyway, she said that as long as my blood test come back okay and im still not experiencing really bad nausea I wont get an US till almost 20 weeks. This is my first pregnancy and im very healthy, but this sounds a little ridiculous. All my friends have had them by at least 10 weeks. I dont think I can wait that long to see my baby! When did you guys get your first US? Is it normal to wait that long if there are no health risks?