Ultrasound Frequency?

I'm currently 34 weeks and I haven't had an ultrasound since 28 weeks. At my next appointment I'll be 36 weeks. Do any of you ladies know when I'll be getting another ultrasound? And are they going to be more frequent or do I just have 1 left? I just wasn't sure if this was normal. I want to know how much she weighs so bad lol! At my 28 week appointment she was 3 pounds 8 oz. ❤️