If your 5-month-old baby seems uncomfortable during feedings, it's important to pay attention to any changes in their behavior or feeding habits. It could be helpful to try different feeding positions, burping your baby more frequently, or adjusting the flow of the bottle nipple. It's also important to make sure your baby is gaining weight and having regular wet and soiled diapers. If you are concerned, it's always a good idea to consult with a healthcare professional for further guidance.