Chatterbox update

So this is the third night in a row he has woke up multiple times and just talked to himself. I can't tell if he fully awake or if he talking in his sleep. He sleeps in his own room and since it so hard to get him to sleep through the night I don't go in there unless he is crying. I'm afraid if I do go and he is awake then he will see me and want to play. He is just waking up, talking for about 5 minutes and going back to sleep. Is this normal?