How often have you had ultrasounds?

Shaylan • Mommy to be! Happily taken by Brandon. 💚
I'm 17 weeks and I feel like my doctor isn't doing as much as she should be. I've only had one ultrasound so far and that was when I went to the hospital for bleeding when I was 6 weeks. I've only heard the heartbeat twice, and the first time was only because I had to ask to make sure my baby was doing OK. Is it normal to only have one or two ultrasounds throughout the entire pregnancy?