Hey mama, Is he still gaining weight well and having at least 4-5 really wet diapers a day? If so, should be nothing to worry about. At two months, baby is beginning to see the world clearer and his senses are heightened. He is curious about the world around him and more active during the day - preoccupied no doubt. So perhaps he chooses to make up for it at night.
best to check with the doctor but if he is gaining weight well, should not be an issue
Angeline Tan