Little to no weight gain? 😔 Help

Li

So I am 28 1/2 weeks pregnant with our little girl and have only gained 3lbs. I did NOT start out overweight (I know sometimes overweight women don’t need to gain as much)...my BMI was a healthy 24.0 when I started this pregnancy so it was recommended that I gain the 25-30lbs. My OB ordered an extra ultrasound to measure and double check baby’s growth when we go back for our next appointment in two weeks. She said not to worry because my fundal height/belly is measuring on track. Baby is moving all day every day with strong movement. Her heartrate was good in the 140s...is there anyone who gained none to little weight and baby was just fine/healthy size? I am SO worried. I can’t quit crying. Lol. I eat enough and eat healthy foods. I walk every day but I never over do it...I just want baby girl to be growing big and strong in there. 😞 I’m terrified of IUGR or anything like that.

Here’s a picture of our beautiful angel almost two weeks ago at 26w6d 💗💗💗