I was born early at 36 weeks labor started naturally and I was born only weighing 4.5 lbs. So…

I was born early at 36 weeks labor started naturally and I was born only weighing 4.5 lbs. So worried my sons gonna be the same way since ive got gestational diabetes and i am measuring small and so is he. Doctor ordered an ultrasound for today so hopefully hes growing okay. Cant wait to see him but im so worried hes still gonna be really small! Then ive got an appointment with my OB to discuss the gestational diabetes and weight gain issues (im not gaining weight any more and only gained 6 lbs in my entire pregnancy) Anyone else have experiences like this they would share? Im so nervous!