Ultrasound measurements

My last Ultrasound at 28 weeks 3 days showed baby is head down and measuring about a week a head weighing 3.3 lbs and in the 78th percentile. Everything looked good. I also passed my gestational diabetes test. Now today at 33 weeks 3 days baby is weighing 5 lbs 7 oz and is in the 74th percentile. Her stomach is measuring large and in the 98th percentile. They questioned my diabetes test and told me not to eat any processed foods and to watch my diet. I go for another ultrasound in 3 weeks at 36 weeks.has anyone had this happen to them? I’m definitely worried and nervous that something is wrong.