Belly measuring small

Ok so I am 33 weeks on Thursday and today I had a baby appointment, when they measured my belly I was measuring 30 weeks instead of 32.4, which was what I was today. I am a taller girl with a long torso, I am kinda worried something might be wrong, I had a measurement scan before this last appointment and was growing perfectly to the measurement, like only a day behind due date, what would happen if the baby did end up being small when I get my next growth ultrasound and do you have any advice?