It is normal for some women to not gain much weight during pregnancy, especially in the first trimester. Factors like metabolism, body type, and genetics can influence weight gain. As long as your healthcare provider confirms that your baby's growth is on track through regular check-ups and ultrasounds, there should be no cause for concern about your baby being small. Exercising regularly and eating a healthy diet are beneficial for both you and your baby's well-being. Remember that every woman's pregnancy journey is unique, so focus on maintaining a balanced lifestyle rather than fixating on weight gain alone. If you have any concerns or questions, consult with your healthcare provider for personalized guidance.