It is not uncommon for pregnant women to have different sizes of bellies at various stages of pregnancy. Factors such as the position of the baby, the mother's body shape, and muscle tone can all contribute to variations in belly size. Additionally, first-time mothers may have smaller bellies compared to those who have been pregnant before.
If your ultrasound confirmed that the baby is healthy and growing properly, there is usually no cause for concern regarding your small belly size. Every pregnancy is unique, and it's important to remember that there is no "one-size-fits-all" when it comes to pregnancy.
However, if you are worried or experiencing any other symptoms such as severe pain or decreased fetal movement, it's always best to consult with your healthcare provider for further evaluation and reassurance.
In terms of what you can do, focus on maintaining a healthy lifestyle by eating a balanced diet and staying active unless advised otherwise by your doctor. Continue attending regular prenatal check-ups so that your healthcare provider can monitor the growth and development of your baby.
Remember that every woman's body responds differently during pregnancy, so try not to compare yourself with others or worry too much about the size of your belly. Trust in the expertise of your healthcare provider and enjoy this special time in your life.