I Have A 7 Month Old Baby That Occasionally Has

I have a 7 month old baby that occasionally has what seems to be tremors of his head when he is nursing and starts to fall asleep. I can wake him out of it if I speak loudly and really rub his chest. I have pried open his eyes while he was doing this and he seemed to have pin-point pupils, but his eyes where not rolled back they were facing forward. He has had a normal EEG