Measuring small

Kimberly👩🏻👨🏾👧🏽👶🏽
So last week I had an appointment with my midwife. When she measured my fundal height she said I was measuring 32cm (supposed to measure 35). Has anyone else experienced this? She put in for an ultrasound but they haven't called me yet to even schedule it, which is very frustrating😡. I'm trying not to worry. That's why I'm reaching out to anyone who has had experience with this.