My son turned 1year on March 5th. At 5 weeks of age, he had surgery for pyloric stenosis. Prior to that surgery, we switched him to a lactose free formula which has been great. Now, we have introduced whole milk/ cow’s milk. We started slow by mixing it with his lactose free formula and gradually increasing intake. This week he has been given whole milk a majority of the time. Now, he is having trouble sleeping. He seems to be fine during the day, but I wondered if this sudden waking, restlessness, and fussiness could be related to the milk not being lactose free? Once awake he has a very hard time settling and going back to sleep. He is waking at least 2 times a night just this week. Thank you