It is not recommended to give Tempra regularly to a 3-month-old baby. It is important to follow the dosage instructions based on the baby's weight and only give the medication as needed. If your baby is experiencing colic, there are non-pharmacological measures that can be taken to help alleviate the symptoms. It is important to monitor your baby for any concerning symptoms, such as decreased or increased feeding, fever, abnormal bowel movements, projectile vomiting, or prolonged crying, and consult a doctor if necessary.